Question

Resolva as equações :
1) x+3x =20
2) 3x + 2x =90
3) x- 8=5

Answer 1

x+3x = 20
4x = 20
x = $\frac{20}{4}$
x = 5

3x + 2x = 90
5x = 90
x = $\frac{90}{5}$
x = 18

x - 8 = 5
x = 5 + 8
x = 13

Answer 2

Resposta:

1(x=5

2(x=18

3(x=13

Explicação passo-a-passo:

1( 4x=20

4x/4=20/4

x=20/4

x=5

2( 5x=90

5x/5=90/5

x=90/5

x=18

3( x=5+8

x=13