0.5x+3y=-6 (1) 0.5x+y=2 (2)
2个回答
0.5x+3y=-6 (1) 0.5x+y=2 (2)
(1)-(2)得
2y=-8
y=-4
x=12
相关问题
解方程.(1)0.3x-0.4x-0.5x=0.6(2)5x-2.5x+3.5x=-18(3)y−12y−13y=1.
解方程(1) {5x+2y=2 7x-5y=34 (2){8x+3y+2=0,6x+5y+7=0 (3){x+1/3-y
- {5x-2y=3{x+6y=7- {x+2y=0{3x+4y-6=0- {x-y=5{2x=15-3y- {3x-2
解方程:①4(-2y+3)=8-5(y-2)② 1.5x 3 - x 0.6 =0.5 .
10-5y=6-2y 和0.5x+2=3-1.5x
解方程组:(1)0.3x-0.5y=-0.9且2.1x+y=7.2 (2)0.2x+0.5y=0且5(x+4-3(y+1
(1)x-y=3 x+y=5 (2)2x+y=32 2x+y=0 (3)3x+2y=5 x+3y=9 (4)6x+5z=
解下列一元一次方程:(1)0.5x-0.7=6.5-1.3x;(2)[y/5]-[y−1/2]=1-[y+2/5];(3
(-x^2+3xy-0.5y^2)-(0.5x^2+4xy-1.5y^2)=-0.5x^2+( )+y^2
解方程组{1/5x+1/3y=2/5 0.5x-0.3y=0.2