若4x+3y+5=0,则3(8y-x)-5(x+6y-2)的值等于_.
问题描述:
若4x+3y+5=0,则3(8y-x)-5(x+6y-2)的值等于______.
答
3(8y-x)-5(x+6y-2)=24y-3x-5x-30y+10=-8x-6y+10=-2(4x+3y)+10=-2×(-5)+10=20.
若4x+3y+5=0,则3(8y-x)-5(x+6y-2)的值等于______.
3(8y-x)-5(x+6y-2)=24y-3x-5x-30y+10=-8x-6y+10=-2(4x+3y)+10=-2×(-5)+10=20.