3(X-5)-2(X+2)=5(X-7)30X-15/2+8x=20x-10/3+410y+1/6+2y-1/3=1-2y+1/4x-2/6-x+2/3=x-1/2+1
3(X-5)-2(X+2)=5(X-7)30X-15/2+8x=20x-10/3+410y+1/6+2y-1/3=1-2y+1/4x-2/6-x+2/3=x-1/2+1
3(X-5)-2(X+2)=5(X-7)
30X-15/2+8x=20x-10/3+4
10y+1/6+2y-1/3=1-2y+1/4
x-2/6-x+2/3=x-1/2+1
3(X-5)-2(X+2)=5(X-7)30X-15/2+8x=20x-10/3+410y+1/6+2y-1/3=1-2y+1/4x-2/6-x+2/3=x-1/2+1
3(X-5)-2(X+2)=5(X-7)
3x-15-(2x+4)=5x-35
3x-15-2x-4=5x-35
3x-2x-5x=-35+15+4
-4x=-16
x=4
30X-15/2+8x=20x-10/3+4
180x-45+48x=120x-20+24
180x+48x-120x=-20+24+45
108x=49
x=49/108
10y+1/6+2y-1/3=1-2y+1/4
120y+2+24y-4=12-24y+3
120y+24y+24y=12+3-2+4
168x=17
x=17/168
x-2/6-x+2/3=x-1/2+1
6x-2-6x+4=6x-3+6
6x-6x-6x=-3+6+2-4
-6x=1
x=-1/6
3(X-5)-2(X+2)=5(X-7)
3x-15-2x-4=5x-35
4x=16
x=4
30X-15/2+8x=20x-10/3+4
180x-45+48x=120x-20+24
...
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3(X-5)-2(X+2)=5(X-7)
3x-15-2x-4=5x-35
4x=16
x=4
30X-15/2+8x=20x-10/3+4
180x-45+48x=120x-20+24
108x=49
x=49/108
10y+1/6+2y-1/3=1-2y+1/4
120y+2+24y-4=12-24y+3
168y=17
y=17/168
x-2/6-x+2/3=x-1/2+1
6x-2-6x+4=6x-3+6
6x=-1
x=-1/6
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(过程略)原方程的解为x= 你老师说有三种,先送他去医院检查一下,我再考虑要不要做这题 第二题:你说的3种情况我现在算到两种了,因为没纸