Answer:
Step-by-step explanation:
-x + 10 = 40
-x = 40 - 10
-x = 30
x = - 30
-3x + 4 = 10
-3x = 10 - 4
-3x = 6
x = 6/-3
x = - 2
x=-30 for A
Step-by-step explanation
subtract both sides by 10 which means 40-10=30
then add the negative sign
