①200x+50(22-x)=1400②10x-5(10-x)=55③3(x+5)+2x=5×6
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①200x+50(22-x)=1400
②10x-5(10-x)=55
③3(x+5)+2x=5×6
① 200x+50(22-x)=1400
200x+1100-50x=1400
150x+1100-1100=1400-1100
150x÷150=300÷150
x=2
② 10x-5(10-x)=55
10x-50+5x=55
15x-50+50=55+50
15x÷15=105÷15
x=7
③ 3(x+5)+2x=5×6
3x+15+2x=30
5x+15-15=30-15
5x÷5=15÷5
x=3
200X+50(22-X)=1400
200X+1100-50x=1400
150x+1100=1400
150x=300
X=2
这么简单
1.x=2
2.x=7
3.x=3
200x+1100-50X=1400 10X-50+5X=55 3X+15+2X=30
150x=300 15X=105 5X=15
X=2 X=7 X=3
①200x+50(22-x)=1400②10x-5(10-x)=55③3(x+5)+2x=5×6
50x+200(22-x)=1400
200x+50(22-x )=1400
解方程:8(X-2)=2(X+7) 200X+50X(22-X)=1400
50X=200+X*X
怎么解方程:200x+50*(22-x)=1400
200x+50(22-x)=1400要过程
200x+50(22-x)=1400要过程
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① :-3x²+22x-24=0 ② :(x+8)(x+1)=-12 ③ :(3x+1)(x+3)=x+14
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