x取何值时,2x+3与-5x+6的值互为相反数?

问题描述:

x取何值时,2x+3与-5x+6的值互为相反数?

2x+3=-(-5x+6)
2x+3=5x-6
3+6=5x-2x
x=3

2X+3-5X+6=0 X=3分给我阿

2x+3=-(-5x+6)
2x+3=5x-6
3+6=5x-2x
9=3x
x=3

2x+3=-(-5x+6)
解得x=3