Question

Qual é o resultado de - x+20=-40 , 5x-20=10 e 3x-5=10

Answer 1

A)-x=-40-20. (*1)
X=40+20
X=60


B)5x=10+20
5x=30
X=30:5
X=6


C)3x=10+5
3x=15
X=15:3
X=5



Espero ter ajudado☺️

Answer 2

$\mathit {-x + 20 = -40}$

$\mathit{-x = -40 - 20}$

$\mathit{-x = -60}$

$\mathit{x = \frac{-60}{-1} }$

$\purple{\mathit{\boxed{\boxed{x = 60}}}}$

$\mathit {5x - 20 = 10}$

$\mathit{5x = 10 + 20}$

$\mathit{5x = 30}$

$\mathit {x = \frac{30}{5} }$

$\purple{\mathit{\boxed{\boxed{x = 6}}}}$

$\mathit {3x - 5 = 10}$

$\mathit{3x = 10 + 5}$

$\mathit{3x = 15}$

$\mathit{x = \frac{15}{3} }$

$\purple{\mathit{\boxed{\boxed{x = 5}}}}$