Question

Resolva as equações do
1° grau:
a) 2·(7x + 2) + 12·(x + 1) = 2
b) 4·(x – 1) –2·(3x + 4) = 6
c) 4·(2x – 3) = 5·(x + 3)

Answer 1

passo a passo embaixo

Explicação passo-a-passo:

a) 2·(7x + 2) + 12·(x + 1) = 2

14x +4 + 12x +12 = 2

14x + 12x = 2 -4 -12

26x = -14

X= -14/26

simplificando = -7/13

b) 4·(x – 1) –2·(3x + 4) = 6

4x - 4 - 6x - 8 = 6

4x - 6x = 6 + 4 +8

-2x = 18 (.-1)

2x = -18

x= -18/2 = -9

c) 4·(2x – 3) = 5·(x + 3)

8x -12 = 5x + 15

8x - 5x = 15 +12

3 x= 27

x= 27/3

x = 9