Question

resolva as equações abaixo:
a) x-3=9
b)4x- 9=1 - 2x
c) x+ 5 = 20 -4x
d) 9x - 4x + 10 =7x - 30

Answer 1

Resposta:

a)x=9+3

x=12

b)4x+2x=1+9

6x=10

10/6 :2 =5/3

c)x+4x=20-5

5x=15

15/5 :5 = 3

d)9x-4x-7x=-30-10

-20x=-40x

-40/-20 :20 = 1/2