jacobdelgado054 jacobdelgado054

16-09-2020
Mathematics

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ChoiSungHyun ChoiSungHyun

16-09-2020

Step-by-step explanation:

As shown in the picture, 3(x + 7) = (x + 7) + (2x - 7) + x.

So 3x + 21 = 4x. This means that x = 21.

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