(x+1)/3=(5y-x)/5 3x-5y=25 求方程组的解
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(x+1)/3=(5y-x)/5 3x-5y=25 求方程组的解
(x+1)/3=(5y-x)/5 3x-5y=25 求方程组的解
(x+1)/3=(5y-x)/5 3x-5y=25 求方程组的解
(x+1)/3=(5y-x)/5 (1)
3x-5y=25(2)
(1)式得:5x+5=15y-3x
8x-15y=-5(3)
(2)式乘以3得:9x-15y=75(4)
(4)-(3)得:x=80;
代入(2)
240-5Y=25
所以Y=43.
X=80;Y=43.
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