9x-16-20=5x解方程

问题描述:

9x-16-20=5x解方程

9X-5X=16+20
4X=36
X=9

x=9

9X-16-20=5X
9X-(16+20)=5X
9X-36=5X
9X-5X-36 =5X-5X
4X-36 =0
4X-36+36=0+36
4X =36
X=9

9x-16-20=5x
9x-5x=20+16
4x=36
x=9

9x-16-20=5x
9x-5x=36
4x=36
x=9

移项:9x-5x=16+20 则:x=9