若x-3y=-3,则5-2x+6y的值是?
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若x-3y=-3,则5-2x+6y的值是?
若x-3y=-3,则5-2x+6y的值是?
若x-3y=-3,则5-2x+6y的值是?
5-2x+6y
=5-2(x-3y)
=5-2*(-3)
=5+6=11
5-2x+6y
=5-2(x-3y)
=5-2*(-3)
=5+6=11
-1是对的,看楼上解答
5-2x+6y=5-2(x-3y)=5-2×(-3)=11
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