-7+2d=15 - solution

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Solution for -7+2d=15 equation:

d in (-oo:+oo)

2*d-7 = 15 // - 15

2*d-15-7 = 0

2*d-22 = 0 // + 22

2*d = 22 // : 2

d = 22/2

d = 11

d = 11

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