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解方程:(X-50)[200+2(70-X)]=4500 (30-2X)(20-2X)=(1-3/8)×30×20 (-1/10X+30)(X-60)=1340(-10X+320)(X-20)-40=310 (X-40)(100-2X+120)=2250 (X-40)(-X/10+8)=17.5
题目内容:
解方程:(X-50)[200+2(70-X)]=4500 (30-2X)(20-2X)=(1-3/8)×30×20 (-1/10X+30)(X-60)=1340
(-10X+320)(X-20)-40=310 (X-40)(100-2X+120)=2250 (X-40)(-X/10+8)=17.5
解方程:(X-50)[200+2(70-X)]=4500 (30-2X)(20-2X)=(1-3/8)×30×20 (-1/10X+30)(X-60)=1340
(-10X+320)(X-20)-40=310 (X-40)(100-2X+120)=2250 (X-40)(-X/10+8)=17.5
(-10X+320)(X-20)-40=310 (X-40)(100-2X+120)=2250 (X-40)(-X/10+8)=17.5
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