Question

resposta com contas obg

Answer 1

Olá,

Vamos lá,

A)5x = 2x + 3
5x - 2x = 3
3x = 3
x = 3/3
x = 1

B)3(2-2x)= -7x
6 - 6x = -7x
7x - 6x = - 6
x = -6


c) 4(2-2x)+7x = 5(3+2x)
8 - 8x + 7x = 15 + 10x
-8x+7x-10x = 15 - 8
-11x = 7      * ( -1)
11 x = 7
x = 7/11


d)6(x-3)=7(x+1)-16
6x -18 = 7x +7 - 16
6x - 7x = 7 -16 +18
-x = 9    *(-1)
x = -9