Question

03) Resolva as equações do 1º grau:
a) 78x – 30x – 18x = 60
b) 12x - 8x + 16 = 28
c) 20 – 45 = - 15x + 10x

Answer 1

a)78x-30x-18=60

30x=60

x=60/30

x=2

b)12x-8x+16=28

4x=28-16

4x=12

x=12/4

x=3

c)20-45= -15x+10

15x=10-20+45

15x=35

x=35/15

x=2,33