Explanation:
12x + 9x - 3 = 3(2x + 14)
12x + 9x - 3 = 6x + 42
21x - 3 = 6x + 42
21x - 6x = 42 + 3
15x = 45
15x/15 = 45/15
x = 3
This is an equation.
See attachment for math work and answer.
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