Question

me ajudem por favor
5x-5+x=9+x
7x-4-x=-2x+8-3x
-x-5+4x=-7x+6x+15
3x-2x=3x+2

Answer 1

Resposta:

A) x= $\frac{14}{5}$

B) X=  $\frac{12\\}{11}$

C) x= 5

D) x=-1

Explicação passo a passo:

A) 5x-5+x=9+x

5x +x -x= 9 +5

5x= 14

x= $\frac{14}{5}$

B) 7x-4-x=-2x+8-3x

7x -x +2x +3x= +8 +4

6x +5x= 12

11x= 12

x=  $\frac{12\\}{11}$

C) -x-5+4x=-7x+6x+15

-x+4x+7x-6x=+15+5

3x+1x= 20

4x= 20

x= $\frac{20}{4}$

x= 5

D) 3x-2x=3x+2

3x-2x-3x=+2

3x-5x=+2

-2x=+2 .(-1)

2x=-2

x=$\frac{-2}{2}$

x=-1