(1-1/5)x=44-x+2.8解这个方程 急

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(1-1/5)x=44-x+2.8解这个方程急(1-1/5)x=44-x+2.8解这个方程急(1-1/5)x=44-x+2.8解这个方程急0.8x=44-x+2.80.8x=46.8-xx+0.8x=

(1-1/5)x=44-x+2.8解这个方程 急
(1-1/5)x=44-x+2.8解这个方程 急

(1-1/5)x=44-x+2.8解这个方程 急
0.8x=44-x+2.8
0.8x=46.8-x
x+0.8x=46.8
1.8x=46.8
x=26

26

26
最后是1.8x=46.8代入可得

4/5X=44-X+2.8
9/5X=46.8
X=46.8*5/9
X=5.2*5
X=26

(1-1/5)x=44-x+2.8
4/5x=46.8-x
9/5x=46.8
x=26

(1-1/5)x=44-x+2.8,
(1-0.2)x=44-x+2.8
1.8x=44+2.8
1.8x=46.8
x=46.8/1.8
x=26.
答:原方程的解为x=26.

0.8X=44-X+2.8
移项得:0.8X+X=44+2.8
合并:1.8X=46.8
解得:X=26

4/5X=41.2-x
9/5x=46.8
x=46.8/9/5
x=26

(1-1/5)x=44-x+2.8
4x=5(46.8-x)
4x=234-5x
9x=234
x=26

回答 共9条
0.8x=44-x+2.8
0.8x=46.8-x
x+0.8x=46.8
1.8x=46.8
x=26