Question

Fill in each empty box to make the statement true.

10+ 5(x + 3) = 5(x + ?)


10 - 3x + 4 =?+ 3(4 - x)

Answer 1

? = 5

? = 2

Explanation:

10 + 5(x + 3) = 5(x + ?)

10 + 5x + 15 = 5x + 5?

5x + 25 = 5x + 5?

5? = 25

? = 25/5

? = 5

10 - 3x + 4 = ? + 3(4 - x)

-3x + 14 = ? + 12 - 3x

14 = ? + 12

? = 14 - 12

? = 2