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(6*(y-7))/5 = -2*y // + -2*y
(6*(y-7))/5-(-2*y) = 0
(6*(y-7))/5+2*y = 0
(6*(y-7))/5+(2*5*y)/5 = 0
6*(y-7)+2*5*y = 0
16*y-42 = 0
(16*y-42)/5 = 0
(16*y-42)/5 = 0 // * 5
16*y-42 = 0
16*y-42 = 0 // + 42
16*y = 42 // : 16
y = 42/16
y = 21/8
y = 21/8
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