Question

Resolva as equações:
a) 2x+4x+18=10
b) 2x+8=7
c) x+3=4
d) 2a+10=30

Answer 1

a) 2x + 4x + 18 = 10
2x + 4x = 10 - 18
6x = - 8
x = - 8/6 (÷ 2)
x = - 4/3

b) 2x + 8 = 7
2x = 7 - 8
2x = - 1
x = - 1/2

c) x + 3 = 4
x = 4 - 3
x = 1

d) 2a + 10 = 30
2a = 30 - 10
2a = 20
a = 20/2
a = 10