tattertott tattertott

12-10-2016
Mathematics

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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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petrally petrally

12-10-2016

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!

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