解方程:2x+y+6/2=4x-3y-7/3=10-6x-7y/4

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解方程:2x+y+6/2=4x-3y-7/3=10-6x-7y/4解方程:2x+y+6/2=4x-3y-7/3=10-6x-7y/4解方程:2x+y+6/2=4x-3y-7/3=10-6x-7y/4原

解方程:2x+y+6/2=4x-3y-7/3=10-6x-7y/4
解方程:2x+y+6/2=4x-3y-7/3=10-6x-7y/4

解方程:2x+y+6/2=4x-3y-7/3=10-6x-7y/4
原式可分为3个等式,但实际只需2个.
①--------2X+Y+3=4X-3Y-7/3
②--------2x+y+6/2=10-6x-7y/4
化简,即:①= 3X-6Y=8
则②= 32X+11Y=28
用②式-①式= 29X+17Y=20
所以X=256/225
Y=172/225

2x+y+6/2=4x-3y-7/3 ---------①
2x+y+6/2=10-6x-7y/4 ------- ②
解方程① x-2y=8/3
② 32x+11y=28
x= 256/225
y= -172/225

X=79/102

2x+y+6/2=4x-3y+24/3=-6x-7y+78/4
3(2x+y+6)=2(4x-3y+24) ==>6x+3y+18=8x-6y+48 2x-9y+30=0
2(2x+y+6)=-6x-7y+78 ==>4x+2y+12=-6x-7y+78 10x+9y-66=0
12x-36=0 x=3
y=36/9=4