Question

If 3x - 30 = 45 - 2x, what is the value of x? a. 5 b. 10 c. 15 d. 20 e. 25

Answer 1

c

Explanation:

given the equation

3x - 30 = 45 - 2x ( add 2x to both sides )

3x + 2x - 30 = 45 - 2x + 2x ( simplify both sides )

5x - 30 = 45 ( add 30 to both sides )

5x - 30 + 30 = 45 + 30 ( simplify both sides )

5x = 75 ( divide both sides by 5 )

`(5)/(5)` x =
`(75)/(5)` , that is

x = 15