Question

Resolva as equações e determine o valor de X:
a) 2x – 7 – x = 3 – 4x
b) 12 – 7 + 4x = 25
c) 4x + 10 = 45 – 3x
d) 15 – x = x – 25

Answer 1

Resposta:

Explicação passo a passo

a) 2x-7-x=3-4x

2x+4x-x=7+3

5x=10

x=10:5

x=2

b) 12-7+4x=25

4x=25+7-12

4x=20

x=20:4

x=5

c) 4x+10 = 45-3x

4x+3x=45-10

7x=35

x=35:7

x=5

d) 15-x=x-25

-x-x =-25-15

-2x=-40

x= -40:-2

x= -20