帮我解四道方程,11/12X-120%X=6.54X+0.4X=70.43X+90%*4=911/12X-120%=6.5

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帮我解四道方程,11/12X-120%X=6.54X+0.4X=70.43X+90%*4=911/12X-120%=6.5帮我解四道方程,11/12X-120%X=6.54X+0.4X=70.43X+

帮我解四道方程,11/12X-120%X=6.54X+0.4X=70.43X+90%*4=911/12X-120%=6.5
帮我解四道方程,
11/12X-120%X=6.5
4X+0.4X=70.4
3X+90%*4=9
11/12X-120%=6.5

帮我解四道方程,11/12X-120%X=6.54X+0.4X=70.43X+90%*4=911/12X-120%=6.5
第一道不知道是否有点问题
x=780/11
2、x=16
3、x=1.8
4、x=8.4