Question

x+5=x+15
4x+5=3x+15
4x+5=x+15
x+5=3x+15

Answer 1

Resposta:

Explicação passo a passo:

1) x+5=x+15

5=15

X∈∅

2)4x+5=3x+15

4x-3x=15-5

x=15-5

x=10

3)4x+5=x+15

4x-x=15-5

3x=15-5

3x=10

x=10/3

4)x+5=3x+15

x-3x=15-5

-2x=10

x=-5

X