Question

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

Answer 1

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 = 0

6x = 14

x = 14/6

x = 7/3

c) 3(2x -1) = -2(x+3)

6x - 3 = - 2x - 6

6x + 2x = - 6 + 3

8x = - 3

x = - 3/8

d) 7(x-1) - 2(x-5) = x-5

7x - 7 - 2x + 10 = x - 5

5x + 3 = x - 5

5x - x = - 5 - 3

4x = - 8

x = - 8/4

x = - 2