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What belongs in the box marked with the question mark in the proof? Given: 3x - 4 = 2(x + 8), Prove: x = 20
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What belongs in the box marked with the question mark in the proof?

Given: 3x - 4 = 2(x + 8), Prove: x = 20

User Phil Miller
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the blank boxes are for you to plug in x=20 to prove its right. so it would be 3(20)-4=2(20+8) 60-4=2(28) 56=56 so its true!
User Miki Shah
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