Question

A)2(×-3)=6




B)1-2(×-1)=×


C)-3(×-5)=×-1



D)-7(×-3)=×+5




E)3(×-2)=5×



F)2-1(×-3)=-6×

Answer 1

Olá, boa noite ☺

Resoluções:

a)

2(x-3)=6
2x-6=6
2x=6+6
2x=12
x=12/2
x=6

b)

1-2(x-1)=x
1-2x+2=x
-2x-x=-1-2
-3x=-3
3x=3
x=3/3
x=1

c)

-3(x-5)=x-1
-3x+15=x-1
-3x-x=-1-15
-4x=-16
4x=16
x=16/4
x=4

d)

-7(x-3)=x+5
-7x+21=x+5
-7x-x=5-21
-8x=-16
8x=16
x=16/8
x=2

e)

3(x-2)=5x
3x-6=5x
3x-5x=6
-2x=6
2x=-6
x=-6/2
x=-3

f)

2-1(x-3)=-6x
2-x+3=-6x
-x+6x=-2-3
5x=-5
x=-5/5
x=-1

Bons estudos :)