-9(2y-7)+4y=5(1-y)-2(1-3y)
-18y+63+4y=5-5y-2+6y
-14y-y=3-63
-15y=-60 /:(-15)
y=4
-14y+63=3+y
-15y=-60
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-18y+63+4y=5-5y-2+6y
-14y-y=3-63
-15y=-60 /:(-15)
y=4
-9(2y-7)+4y=5(1-y)-2(1-3y)
-18y+63+4y=5-5y-2+6y
-14y+63=3+y
-15y=-60
y=4