[solving equation] (1) 1 / 2x = 3 / 4 (2) 2 / 3x + x = 15)
1/2x=3/4
x=3/2
2/3x+x=15
5/3x=15
x=9
RELATED INFORMATIONS
- 1. If we know that AB is a coprime number and 9A + 18B is the square of a number, how many pairs of numbers can a and B take The surface area of a cube is 384 square decimeters. Divide the cube into 64 equal small cubes. What is the surface area of each small cube? 3. A project with 14 workers can be completed in 12 days. How many more people will be needed if it is to be completed in the first four days
- 2. (a-b)(a+b)=______ (a-b)(a2+ab+b2)=______ (a-b)______ =a4-b4(a-b)______ =an-bn.
- 3. Calculate the square of (- AB) of square B of A
- 4. Calculate the square of a of B-A of b-ab of a + B of B=
- 5. Factorization a ^ 2 + 2Ab + B ^ 2-3a-3b-4
- 6. How to factorize a ^ 2 + 2ab-3a-3b How to group and decompose a ^ 2 + 2ab-3a-3b
- 7. Factorization factor 4 (a-b) square-9a + 9b
- 8. Given that a minus 6A plus 9 equals 0, try to factorize x square plus ax minus 4
- 9. Factorization factor ax (Square-1 of Y) - ay (Square-1 of x)
- 10. Square of a + square of ax-b + BX factorization factor 1. Use the square difference formula to get the value of (2 + 1) (the square of 2 + 1) (the fourth power of 2 + 1) (the eighth power of 2 + 1) (the 64th power of 2 + 1)
- 11. Bruce Lee mistakenly wrote a number multiplied by 6 as divided by 6. Then he wanted to add 19, but he mistakenly subtracted 19, and finally got to 36, If calculated according to the correct operation, what should it be
- 12. In equilateral △ ABC, the bisectors of ∠ ABC, ∠ ACB intersect at point O. if the vertical bisectors of OB and OC intersect at points E and F, the quantitative relationship between EF and ab is conjectured and proved
- 13. Simple calculation of 222 × 111 + 111 × 444 It is a simple operation of 222 × 778 + 111 × 444
- 14. If the radius of ⊙ o is 10, the chord AB = 12, the chord CD = 16, and ab ∥ CD, then the distance between the two chords is______ .
- 15. Simple calculation of 2000 × 19991999-1999 × 20002000 Try to finish on the same day! Don't copy!
- 16. When m takes what value, the solution of the equation 4x + m (X-6) = 2 (2 + 3M) about X is a positive integer Attention! It's 2 + 3M, not 2-3m
- 17. Fill in the blanks: 1 / 6, 1 / 4, 3 / 8, (), (), 81 / 64
- 18. What is the solution of equation 3 / (x-1) + 4x / (1 + X & sup2;) = - 1 / (x + 1) and how to solve this equation?
- 19. How much is a multiplied by its reciprocal and a equals one and four fifths
- 20. Calculation formula of trapezoid circumference Circumference!