Question

7x+25-40=5x-x+30
me ajudem por favor
:(​

Answer 1

Olá!

$7x+25-40=5x-x+30\\\\7x-15=5x-x+30\\\\7x-15=4x+30\\\\7x-15+15=4x+30+15\\\\7x=4x+45\\\\7x-4x=4x+45-4x\\\\3x=45\\\\\frac{3x}{3}=\frac{45}{3}\\\\x=15$

Espero ter ajudado, tenha boas aulas!

Answer 2

15

Explicação passo-a-passo:

7x + 25 - 40 = 5x - x + 30

7x - 15 = 4x + 30

7x - 15 - 4x = 30

7x - 15 = 30

3x = 30 + 15

3x = 45

x = 45 / 3

x = 15