tattertott tattertott

12-10-2016
Mathematics

Answered

What belongs in the box marked with the question mark in the proof?

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

Verified Answer :

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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