Question

3-Resolva as equaçoes

a) 3(x-2)=2x-4
b) 2(x-1)=3x+4
c) 7(x-1)=2x-3

ME AJUDA PFV.​

Answer 1

Vamos lá, te ajudarei a resolver as questões:

$a) \: 3(x - 2) = 2x - 4$

$3x - 6 = 2x - 4$

$3x - 2x = - 4 + 6$

$x = 2$

$b) \: \: 2(x - 1) = 3x + 4$

$2x - 2 = 3x + 4$

$2x - 3x = 4 + 2$

$x = 6$

$c) \: \: 7(x - 1) = 2x - 3$

$7x - 7 = 2x - 3$

$7x - 2x = - 3 - 7$

$5x = - 10$

$x = \frac{ - 10 }{ \: 5 }$

$x = - 2$