T Andre solved an equation, but when he checked his
answer he saw his solution was incorrect. He knows he
made a mistake, but he can't find it. Where is Andre's
mistake?
12x – 5 = 3(x + 4)
12x – 5 = 3x + 4
12x = 3x – 1
9x = -1
9x
-1
=
What is the solution to the equation?
1
X = -
9
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