若4X+3Y+5=0,则3(8Y-X)-5(X+6Y-2)的值等于____.
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# WIS
若4X+3Y+5=0,则3(8Y-X)-5(X+6Y-2)的值等于____.
若4X+3Y+5=0,则3(8Y-X)-5(X+6Y-2)的值等于____.
若4X+3Y+5=0,则3(8Y-X)-5(X+6Y-2)的值等于____.
4X+3Y+5=0
4X+3Y=-5
3(8Y-X)-5(X+6Y-2)
=24Y-3X-5X-30Y+10
=-8X-6Y+10
=-2(4X+3Y)+10
=-2*(-5)+10
=20
20
括号都打开,整理得
-8x-6y+10 =?
已知 4x+3y=-5
代进去
4X+3Y+5=0
4X+3Y=-5
3(8Y-X)-5(X+6Y-2)
=24Y-3X-5X-30Y+10
=-8X-6Y+10
=-2(4X+3Y)+10
=-2*(-5)+10
=20
纯手打,望采纳
因为4X+3Y+5=0
所以4X+3Y=-5
所以3(8Y-X)-5(X+6Y-2)
=24Y-3X-5X-30Y+10
=-8X-6Y+10
=-2(4X+3Y)+10
=-2*(-5)+10
=20
3(8Y-X)-5(X+6Y-2)
=24y-3x-5x-30y+10
=-8x-6y+10
=-2(4x+3y+5)+20
=-2*0+20
=20
0
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