5(x-10)=30-15x
Expand by using distributive property
5x - 50 = 30 - 15x
Add 15x to both sides
5x - 50 + 15x = 30 - 15x + 15x
Combine like terms and simplify
20x - 50 = 30
Add 50 to both sides
20x - 50 + 50 = 30 + 50
Simplify
20x = 80
Divide both sides by 20
20x / 20 = 80/20
Simplify
x = 4
Answer
B. second option
x = 4