Question

Use algebra tiles to solve 3x+9=15.

Answer 1

x = 2

Explanation:

3x + 9 = 15

3x + 9 - 9 = 15-9

3x + 0 = 6

3x/3 = 6/3

x = 2

Check:

3*2 + 9 = 15

6 + 9 = 15

Answer 2

`3x + 9 = 15 \\ \\ 3x = 15 - 9 \\ \\ 3x = 6 \\ \\ x = (6)/(3) \\ \\ x = 2`

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