3(x+30)=50-2x+4

问题描述:

3(x+30)=50-2x+4

化简2X*X-23/12*X-103/10=0 X1=(23/12+(61973/720)^0.5)/4约等于2.79856329 X2=(23/12-(61973/720)^0.5)/4约等于-1.840229956 哥们

3(x+30)=50-2x+4
3x+90=50-2x+4
3x+2x=54-90
5x=-36
x=-7.2

3x+90=54-2x
5x=-45
x=-9