问题
填空题
已知2x+3y=5,则6x-4y-2(x-5y)=______.
答案
6x-4y-2(x-5y)=6x-4y-2x+10y=4x+6y=2(2x+3y);
∵2x+3y=5,∴原式=2×5=10.故填10.
已知2x+3y=5,则6x-4y-2(x-5y)=______.
6x-4y-2(x-5y)=6x-4y-2x+10y=4x+6y=2(2x+3y);
∵2x+3y=5,∴原式=2×5=10.故填10.