7a+9=-6a+126

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Solution for 7a+9=-6a+126 equation: 


a in (-oo:+oo)

7*a+9 = 126-6*a // - 126-6*a

7*a-(-6*a)-126+9 = 0

7*a+6*a-126+9 = 0

13*a-117 = 0 // + 117

13*a = 117 // : 13

a = 117/13

a = 9

a = 9

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