\( x+7 x+4 x=180 \)
Answer
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Answer
\(x = \frac{180}{12} = 15\)
Steps
Step 1 ：\(x + 7x + 4x = 180\)
Step 2 ：\(12x = 180\)
Step 3 ：\(x = \frac{180}{12} = 15\)
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