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q in (-oo:+oo)
-(2*((7*q)/5-1))-9 = (16*q)/5-2 // - (16*q)/5-2
2-(2*((7*q)/5-1))-((16*q)/5)-9 = 0
(-16/5)*q-2*((7*q)/5-1)-9+2 = 0
(-16*q)/5-2*(7/5*q-1)-9+2 = 0
(-2*5*(7/5*q-1))/5+(-16*q)/5+(-9*5)/5+(2*5)/5 = 0
2*5-2*5*(7/5*q-1)-16*q-9*5 = 0
10-30*q-45+10 = 0
10-30*q-35 = 0
-30*q-25 = 0
(-30*q-25)/5 = 0
(-30*q-25)/5 = 0 // * 5
-30*q-25 = 0
-30*q-25 = 0 // + 25
-30*q = 25 // : -30
q = 25/(-30)
q = -5/6
q = -5/6
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