6 x plus 2.8 times 0.5 equals 10.6: equation, process

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1. Where is the zero point of equation log3 x + x-3 equal to 0? Where is the zero point of equation log3 x + x-3 equal to 0?
2. 0:4x plus 6:3 equals 10:5. Simple and slightly complicated equation (solve the following equation)
3. 2 & ~ 178; + 1 / (2 & ~ 178; - 1) + 3 & ~ 178; + 1 / (3 & ~ 178; - 1) +... + 100 & ~ 178; + 1 / (100 & ~ 178; - 1) is equal to the solving process
4. (√ 3 + 2) &# 178; how much is it?
5. -What is 4 (a + 3) (A-3) + 3 (A-2) & # 178?
6. What is – 2 = a (1 – 3) & # + 2 a?
7. 3.14 × (12 △ 2) &# 178; how much is equal to the formula
8. Why is it equal to 4? That √ is the root
9. Why is √ 4 = ± 2, while √ 2 & # 178; only equal to 2 But √ 2 & # 178; can only be equal to 2
10. 2 & # 178; + 4 & # 178; + 6 & # 178; +. + 50 & # 178; what is equal to In a hurry
11. How to solve the equation that two x minus seven equals x plus zero four?
12. Nine out of ten equals 0.75
13. What's a quarter times 0.75
14. How many seconds is 0.5 minutes
15. How much is [- 1 + (- 1 / 3) & # 178; × (- 1) & # 179;] / (1 / 6-1) equal to?
16. Given that a (A-1) - (A & # 178; - b) = 4, find the value of algebraic formula 2 / A & # 178; + B & # 178; - ab
17. Given a & # 178; - AB = - 18, ab-b & # 178; = - 12, the values of the algebraic expressions a & # 178; - B & # 178; and a & # 178; - 2Ab + B & # 178; are obtained
18. If a & # 178; - AB = 10, ab-b & # 178; = - 5, then the algebraic formula A & # 178; - B & # 178=_______ ,a²-2ab+b²=______
19. Given a & # 178; - AB = 26, ab-b & # 178; = 18, find the values of the algebraic expressions a & # 178; - B & # 178; and a & # 178; - 2Ab + B & # 178
20. Given a (A-1) - (A & # 178; - b) = 2, then the value of the algebraic expression ab - (A & # 178; + B & # 178;) △ 2 is Urgent request