1/2t+9=7 - solution

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Solution for 1/2t+9=7 equation:

t in (-oo:+oo)

(1/2)*t+9 = 7 // - 7

(1/2)*t-7+9 = 0

1/2*t+2 = 0 // - 2

1/2*t = -2 // : 1/2

t = -2/1/2

t = -4

t = -4

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