連立方程式6(小数)

次の連立方程式を解け

0.1x+0.5y=-1.30.3x+0.4y=-0.61.2x+0.4y=22.1x-0.4y=4.6
-2x-1.8y=-5.83.3x-2.1y=4.51.1x-0.3y=1.40.2x+1.5y=-1.3
-0.3x+2y=8.61.9x+2.4y=5.80.8x+1.1y=-0.3-0.9x+2.5y=-3.4
1.5x-1.2y=-6.910.2x+9.8y=-112.4x-1.8y=-0.62.5x-1.3y=3.4

x=2,y=-3x=2,y=-1x=2,y=1x=1,y=-1x=-2,y=4x=1,y=-1x=-3,y=2x=5,y=7