Question

Resolva as equações abaixo:

a) 7x+6 = 10+3x

b) -3x = -27

c) x+x/8 = 9

d) 2x/4+ 20 = x/4

Answer 1

a) 7x+6=10+3x
7x-3x=10-6
4x=4
x=4÷4
x=1

Answer 2

a)7x-3x=10-6
4x =4
x=1
b)x=(-27):(-3)
x=9
c) 8x/8+x/8=72/8
9x=72
x=72:9
x=8
d)2x/4-x/4=-20
x/4=-20
x=(-20).4
x=-80