Question

Qual o Valor de X nas equações:
10x-8=2x
15x+12=10x-8
4(x+3)=20

Answer 1

10x-8=2x
10x-2x=8
8x=8
x=1


15x+12=10x-8
15x-10x=-12-8
5x=-20
x= -20/5
x= -4


4(x+3)=20
4x+12= 20
4x=20-12
4x= 8
x= 8/4
x= 2

Answer 2

Olá, bom dia ☺

Resolução:

1)

10x - 8 = 2x.

10x - 2x = 8.

8x = 8.

x= 8/8.

x=1.

2)

15x+12=10x-8

15x - 10x = -8 - 12.

5x= -20.

x= -20/5.

x= -4.

3)

4(x+3)=20.

4x  + 12 = 20.

4x = 20 - 12.

4x= 8.

x=8/4.

x=2.

Bons estudos :)