Question

) Calcule o valor do x: 3x+10=2x b) 3x-20=x+80 c) 8-5x=X d) 5(x-2)=2 +3x​

Answer 1

Resposta:

a) 3x+10=2x

3× - 2× = 10

× = 10

b) 3x-20=x+80

3× - × = 80 + 20

2× = 100

× = 100/2

×= 50

c) 8-5x=X

8 = × + 5×

8 = 6×

6× = 8

× = 8/6

d) 5(x-2)=2 +3x

5× -10 = 2 + 3×

5× - 3× = 2 + 10

2× = 12

× = 12/2

× = 6