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What is the value of X on this triangle?
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What is the value of X on this triangle?

What is the value of X on this triangle?-example-1
User Paul Prewett
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\bf (x-4)+(3x)+100=180\implies x-4+3x+100=180 \\\\\\ 4x+96=180\implies 4x=84\implies x=\cfrac{84}{4}\implies x=21

User DantheMan
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