50x+70(x-1）=530怎么解
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50x+70(x-1）=530怎么解50x+70(x-1）=530怎么解50x+70(x-1）=530怎么解50x+70(x-1）=53050x+70x-70=530120x=530+70120x=6
50x+70(x-1）=530怎么解
50x+70(x-1）=530怎么解
50x+70(x-1）=530怎么解
50x+70(x-1）=530
50x+70x-70=530
120x=530+70
120x=600
x=5
50x+70(x-1）=530
50x+70x-70=530
120x=600
x=5
分解因式，50x+70x-70=530,120x=530+70,120x=600,x=600/120,x=5
50x+70X-70=530
120x=600
x=5
50x+70(x-1）=530
50x+70x-70=530
120x=600
x=5
50x+70(x-1）=530
50X+70X-70=530
120x=600
X=50