3(x+2)-2(x-3)=16 2.5(5-x)=3(x+4)-3
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3(x+2)-2(x-3)=162.5(5-x)=3(x+4)-33(x+2)-2(x-3)=162.5(5-x)=3(x+4)-33(x+2)-2(x-3)=162.5(5-x)=3(x+4)-33
3(x+2)-2(x-3)=16 2.5(5-x)=3(x+4)-3
3(x+2)-2(x-3)=16 2.5(5-x)=3(x+4)-3
3(x+2)-2(x-3)=16 2.5(5-x)=3(x+4)-3
3(x+2)-2(x-3)=16
3X+6-2X+6=16,
X=4
2.5(5-x)=3(x+4)-3
25-5X=3X+12-3
-8X=-16
X=2.
3(x+2)-2(x-3)=16
3x + 6 -2x + 6 = 16
x = 4
2.5(5-x)=3(x+4)-3
12.5 - 2.5x = 3x + 12 -3
3.5 = 5.5x
x = 11 分之 7
答:
1)3(x+2)-2(x-3)=16
3x+6-2x+6=16
x+12=16
x=4
2)2.5(5-x)=3(x+4)-3
12.5-2.5x=3x+12-3
3x+2.5x=12.5-9
5.5x=3.5
x=3.5/5.5
x=7/11
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