Question

RESOLVA AS EQUAÇOES
4 (X + 1 ) = 12 ?
5(3- X ) - 4X = 18 ?
9X - 3 (2X + 2) = 15 ?
2,5 (X - 2 ) - 1,5X = 1 ?

Answer 1

Olá Julia

4*(x + 1) = 12
4x + 4 = 12
4x = 8
x = 2

5*(3 - x) - 4x = 18
15 - 5x - 4x = 18
9x = -3
x = -1/3 

9x - 3*(2x + 2) = 15
9x - 6x - 6 = 15
3x = 21
x = 7

2.5*(x - 2) - 1.5x = 1
2.5x - 5 - 1.5x = 1
x = 6