Question

Resolva as equações
5(X-1)=30
2 (X-1)-7=16
7 (X-2)=5(X-3)
2(3X-5)-X=10-3Y
2(X-5)+4 (X-1)=0

Answer 1

a)5(X-1)=30
5x-5=30
5x=35
x=7

b)2 (X-1)-7=16
2x-2-7=16
2x=25
x=25/2

c)7 (X-2)=5(X-3) 
7x-14=5x-15
2x=1
x=1/2

d)2(3X-5)-X=10-3Y
6x-10-x=10-3y
5x=20-3y
x=(20-3y)/5

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