Question

Qual o valor de X?
A)2x=16
B)2.(x-2)+5.(2-x)+6.(x+1)=0
C)3.(x-2)-(1-x)=13

Answer 1

Olá,

Vamos lá,

A)2x=16
x = 16/2
x = 8

B)2.(x-2)+5.(2-x)+6.(x+1)=0
2x - 4 +10-5x+6x +6 =0
3x = 4 -10-6
3x = -12
x = -12/3
x = -4

C)3.(x-2)-(1-x)=13
3x - 6 -1 +x = 13
3x + x = 13 + 6 + 1
4x = 20
x = 20/4
x = 5