-4+2n=-20 - solution

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Solution for -4+2n=-20 equation:

n in (-oo:+oo)

2*n-4 = -20 // + 20

2*n-4+20 = 0

2*n+16 = 0 // - 16

2*n = -16 // : 2

n = -16/2

n = -8

n = -8

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