Asked by Anonymous

need help checking

Create a 2-column proof for the following equation.

X + X + 10 + 2(2X + 10) = 180

X + X + 10 + 2(2X + 10) = 180 (Given)
2X + 10 + 2(2X + 10) = 180 (Simplify)
2X + 10 + 4X + 20 = 180 (Expand)
6X + 30 = 180 (Simplify)
6X = 180 - 30 (Subtract)
6X = 150 (Simplify)
X = 150/6 (Divide)
X = 25 (Simplify)
Answered by Anonymous
Sorry, I meant to ask if these were correct.
Answered by Reiny
Your steps are correct, as is your solution
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