Question

Resolva as equações:
A) 2x - 8 = x + 9
B) 4x + 20 = 2x + 40
C) 5x - 12 = x + 36
D) 6x + 14 = -x + 7
E) 10x - 15 = 5x + 25
F) 3x - 8 = -x + 12

Answer 1

Resposta:

a)2x-x=9+8

x=17

b)4x-2x=40-20

2x=20

x=20÷2

x=10

c)5x-x=36+12

4x=48

x=48÷4

x=12

d)6x+x=7-14

7x=-7

x=-7÷7

x=-1

e)10x-5x=25+15

5x=40

x=40÷5

x=8

f)3x+x=12+8

4x=20

x=20÷4

x=5