Question

Resolva:
a) 5x+3=16
b)x+x+8=54
c)7x-2-5x=18
d)12x-10x-4=11

Answer 1

a)5x+3=16
5x=16-3
5x=13
X= 13/5 -> x= 2,6

b) x+x+8=54
X+x=54-8
2x=46
x=46/2 -> 23

c)7x-2-5x=18
7x-5x=18+2
2x=20
X=20/2 -> 10

d)12x-10x-4=11
12x-10x=11+4
2x=15
X=15/2 -> 7,5