Question

Help ASAP for 20 points I will mark brainless

Answer 1

x=-30 for A

Step-by-step explanation

subtract both sides by 10 which means 40-10=30

then add the negative sign

Answer 2

Explanation:

-x + 10 = 40

-x = 40 - 10

-x = 30

x = - 30

-3x + 4 = 10

-3x = 10 - 4

-3x = 6

x = 6/-3

x = - 2