x+y=6,0.25x+0.4y=6*0.3
3个回答
y=6-x
代入0.25x+0.4y=6*0.3
0.25x+2.4-0.4x=1.8
0.15x=0.6
所以x=4
y=6-x=2
相关问题
1.{2x+y=-2,2x-y=6 2.{0.25x-0.5y=2,0.4x+0.25y=20
x+y=95 0.4x+0.78y=0.6x+0.6y
解方程0.3x+0.4y=4,0.3x+2=0.6y
{X+5Y=6 {3X-6Y-4=0
解方程3y^2+y-14=0x^4-26x^2+25=0X(6x-5)=4分解因式7x^2-16x+4x^3 y^3-6
{0.6x-0.4y=1.1,0.2x-0.4y=2.3;
已知集合P={(x,y)|{3x-4y+3≥0,4x+3y-6≤0,y≥0}},Q={(x,y)|(x-a)²
0.4x+0.1y+0.7=x+0.6y+0.05=1.6x+0.1(y+1)求解
x-z-2=0,3x-6y-7=0,3y+3z-4=0
因式分解 x²+6x+y²-8y+25=0