Question

a) 13+4(2x-1)=5(x+2) b) 8(x-1)=8-4(2x-3) c) 2(x-1)=3x+4 d) 2(x+8)=3x+4 e) 7(x-4)=2x-3

Answer 1

Vamos lá Daniel,

(A)

13 + 4(2x - 1) = 5
13 + 8x - 4 = 5
8x = 5 - 9
8x = - 4
x = - 4 / 8
x = - 1 / 2

(B)

8(x - 1) = 8 - 4(2x - 3)
8x - 8 = 8 - 8x + 12
8x + 8x = 4 + 8
16x = 12
x = 12 / 16
x = 0,75

(C)

2(x - 1) = 3x + 4
2x - 2 = 3x + 4
2x - 3x = 4 + 2
-x = 6 (-1)
x = 6

(D)

2(x + 8) = 3x + 4
2x + 16 = 3x + 4
2x - 3x = 4 - 16
-x = -12 ( -1)
x = 12

(E)

7(x - 4) = 2x - 3
7x - 28 = 2x - 3
7x - 2x = -3 + 28
5x = 25
x = 25 / 5
x = 5

Espero ter ajudado (:
Bons estudos!