Given 4a+2b+5c=5,3a+b+4c=3, find the algebraic expression a+3b Specific process

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• 1. The simplified re-calculation: Given A=4a2+5b, B=-3a2-2b, find the value of 2A-B, where a=-2, b=1. Let A=4a2+5b, B=-3a2-2b, and find the value of 2A-B, where a=-2, b=1.
• 2. Given the square of (a+2)+|a+b+5|=0, find the value of the square of algebra 3a b-[ the square of 2a b-(the square of 2ab-a b)-4a ]-ab.
• 3. Fill in the brackets to indicate the quantity of unit "1" The amount of water used in 1.6 months is equivalent to 10 of 7 in May. 2. One second of the rope has been used.{} 3. The unit price of chair is 10/8 of the unit price of table {} 4. The cock count is five-sixths of the hen count.{} Fill in the brackets to indicate the quantity of unit "1" The amount of water used in 1.6 months is equivalent to 10 out of 7 in May. 2. One second of the rope has been used.{} 3. The unit price of chair is 10/8 of the unit price of table {} 4. The cock count is five-sixths of the hen count.{} Fill in the brackets to indicate the quantity of unit "1" The amount of water used in 1.6 months is equivalent to 10/7 of that in May. 2. One second of the rope has been used.{} 3. The unit price of chair is 10/8 of the unit price of table {} 4.A rooster is five-sixths of a hen.{}
• 4. Is it true that mole is the unit of quantity of matter? What is the quantity unit and how does it differ from the unit? Is it true that mole is the unit of quantity of matter? What is a quantity unit and how does it differ from a unit?
• 5. Some of the original rice in the warehouse, has shipped out half of the total less 5 tons, there are 18 tons, the original rice in the warehouse how many tons? How can I explain to my children? Thank you. There were some rice in the warehouse. Half of the rice had been shipped out,5 tons less. There were 18 tons left. How many tons of rice were there? How should I explain this to the children? Can I give a specific explanation? Thank you.
• 6. If a, b, c are natural numbers and they satisfy the condition that root number a-2 root number 6 is equal to root number b-root number c, find the value of a
• 7. The value of a2+b2-4a+2b+7 is always
• 8. Given a+b2-4a-2b+5=0, the value of root a+b/root 3-2 root 2 is?
• 9. Given a2+b2-4a-2b+5=0, find A + b 2 The value of a+b+1.
• 10. It is known that a, b, c are the trilateral lengths of △ABC and satisfy the relation C2−a2−b2 a-b|=0, the shape of △ABC is ______.
• 11. Given the square of 4a minus the square of 3b=7,3a+2b=19, where does the square of 14a-2b come from? Problem solving Given the square of 4a minus the square of 3b=7,3a+2b=19, where does the square of 14a-2b come from? In solution
• 12. If the square of algebraic expression a minus 2a plus 2 is 4, what is the square of algebraic expression 2a minus 4a plus 7? Urgent!
• 13. If the value of algebraic expression 4a square-2a+5 is 9, then algebraic expression 2a square-a+1=
• 14. 0
• 15. Specifies what a new operation a*b=a+b, a #b=a-b,其中a,b为有理数,则化简a*a*b*3ab+5a*ab#4ab a=5, b=3 evaluates to Specify what a new operation a*b=a+b, a #b=a-b,其中a,b为有理数,则化简a*a*b*3ab+5a*ab#4ab a=5, b=3 will evaluate
• 16. A kind of operation: a*b=a+b, a b=a-b, where a, b are rational numbers.
• 17. If |3a+b+5||2a-2b-2|=0, the value of the square-3ab of 2a is ___
• 18. Finding the Rational Numbers a and b of the Condition a+b/3+1=2a-b=a-2b Find the rational numbers a and b of the condition a+b/3+1=2a-b=a-2b
• 19. For any non-zero rational number a, b, the defined operation is as follows: a*b=(a-2b)÷(2a-b). For any nonzero rational number a, b, the defined operation is as follows: a*b=(a-2b)÷(2a-b).
• 20. If the operation "()" is defined as follows for any nonzero rational number a.b: a () b=(a-2b) divided by (2a-b), the value of (-3)*()*5 is obtained.