｛16X+Y=-8.75×4 X+16Y=-12.5×4

若x-y=1 化简（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16) 4x+2y=16 x-y=1, x+y=16 8x+4y=104 解方程组 10（x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610（x-y)=3(x+y)+156(x+y)=4(2x-y)+16 解方程组 10（x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610（x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。 5X+16X= Y+9Y= X+7X-4X= （x-4y=-1 2x+y=16) (x-y=1 2x+y=5 ) 解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 2(X-Y)/3=(X+Y)/4 -1 6(X+Y)=4(2X-Y)+16解方程 2(x-y)/3-(x+y)/4=-1 (1) 6(x+y)-4(2x-y)=16 (2) 6(x+y)=4(2x-y)+16,2(x-y)/3=x+y/4-1 2(x-y)/3—x+y/4=1 6(x+y)—4(2x-y)=16 3分之2(x-y)-4分之x+y=-1 8(x+y)-4(2x-y)=16 若x*x+y*y-4x+16y+13=0 ,则x=____ y=____ 8x-8y-3x-3y=-12,6x+6y-8x+4y=16 3分之2(X-Y)-4分之X+Y=-1,3(X+Y)-2(X-Y)=16 (2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16