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 
x = 14/6
x= 7/3

c) 3(2x-1)=-2(x+3)
6x - 3 = -2x + 6
6x + 2x = 6 + 3
8x = 9
x = 9/8

d) 7(x-1)-2(x-5)=x-5
7x - 7 -2x - 10= x-5
5x -17 = x-5
5x-x= 17 -5
4x = 12
x= 12/4
x=3