4a+7=-9

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Solution for 4a+7=-9 equation: 


a in (-oo:+oo)

4*a+7 = -9 // + 9

4*a+7+9 = 0

4*a+16 = 0 // - 16

4*a = -16 // : 4

a = -16/4

a = -4

a = -4

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