若12-3(9-y)与5(y-7)的值相等 求y=多少

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若12-3(9-y)与5(y-7)的值相等求y=多少若12-3(9-y)与5(y-7)的值相等求y=多少若12-3(9-y)与5(y-7)的值相等求y=多少12-3(9-y)=5(y-7)12-27+

若12-3(9-y)与5(y-7)的值相等 求y=多少
若12-3(9-y)与5(y-7)的值相等 求y=多少

若12-3(9-y)与5(y-7)的值相等 求y=多少
12-3(9-y)=5(y-7)
12-27+3y=5y-35
3y-5y=-35-12+27
-2y=-20
y=10

12-3(9-y)=5(y-7)
-15+3y=5y-35
-2y=-20
y=10

12-3(9-y) = 5(y-7)
12 - 27 + 3y = 5y - 35
2y =20
y = 10