Question

37 Resolva as equações.
a) 7(x - 2) = 5(x + 3)
b) 2(x - 5) + 4(x - 1) = 0
c) 3(2x - 1) = - 2(x + 3)
d) 7(x - 1) - 2(x - 5) = x - 5. Por favor preciso pra hoje​

Answer 1

Explicação passo-a-passo:

a) 7(x -2) = 5(x + 3) => 7x - 14 = 5x + 15 => 7x - 5x = 15 + 14 => 2x = 29 => x = 29/2

b) 2(x - 5) + 4(x - 1) = 0 => 2x - 10 + 4x - 4 = 0 => 6x = 14 => x = 14/6 => x = 7/3

c) 3(2x - 1) = -2(x + 3) => 6x - 3 = -2x - 6 => 6x + 2x = -3 => 8x = -3 => x=-3/8

d) 7(x-1) - 2(x-5) = x - 5 => 7x - 7 - 2x + 10 = x - 5 => 7x - 2x - x = - 5 - 10 + 7

=> 4x = -8 => x = -8/4 => x = -2