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一道解方程组的题!(2x+5)(y+3)=(x+4)(2y+3)(3x+2)(5y+6)=5(x+1)(3y+4)
题目详情
一道解方程组的题!
(2x+5)(y+3)=(x+4)(2y+3)
(3x+2)(5y+6)=5(x+1)(3y+4)
(2x+5)(y+3)=(x+4)(2y+3)
(3x+2)(5y+6)=5(x+1)(3y+4)
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答案和解析
分别化简(2x+5)(y+3)=(x+4)(2y+3) 2xy+6x+5y+15=2xy+3x+8y+123x-3y+3=0x-y+1=0 (3x+2)(5y+6)=5(x+1)(3y+4) 15xy+18x+10y+12=15xy+20x+15y+20-2x-5y-8=0 2x+5y+8=0新方程组为x-y+1=0 2x+5y+8=0解得x=-13/7 y=-6/7...
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