二元一次方程组专项训练计算题.doc

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1、1.2x+9y=813x+y=342.9x+4y=358x+3y=303.7x+2y=527x+4y=624.4x+6y=549x+2y=875.2x+y=72x+5y=196.x+2y=213x+5y=567.5x+7y=525x+2y=228.5x+5y=657x+7y=2039.8x+4y=56x+4y=2110.5x+7y=415x+8y=4411.7x+5y=543x+4y=3812.x+8y=154x+y=2913.3x+6y=249x+5y=4614.9x+2y=624x+3y=3615.9x+4y=467x+4y=4216.9x+7y=1354x+y=4

2、117.3x+8y=51x+6y=2718.9x+3y=994x+7y=9519.9x+2y=383x+6y=1820.5x+5y=457x+9y=6921.8x+2y=287x+8y=6222.x+6y=143x+3y=2723.7x+4y=672x+8y=2624.5x+4y=527x+6y=7425.7x+y=94x+6y=1626.6x+6y=486x+3y=4227.8x+2y=167x+y=1128.4x+9y=778x+6y=9429.6x+8y=687x+6y=6630.2x+2y=227x+2y=4731.5x+3y=83x+5y=832.6x-7y=

3、5x+2y=433.10x-8y=14x+y=534.4x+7y=3x+y=035.3x+y=107x-y=2036.44x+10y=27x+y=137.8x-y=0x+y=1838.11x-y=1211y-x=-1239.5x+6y=272x+3y=1240.7x-2y=4x+2y=1241.(2x+y)-5y=22x-5y=042.7x-3y=33x+2y=2143.7x+2y=21y-6x=144.10x-8y=03x-2y=245.3x+y=105x-7y=846.3x-2y=1x-y=347.x+3y=-53x-4y=-248.y-3x=2x-2y=649.5

4、x+3y=22x-y=350.9x-3y=122x+y=651.2x+3y=73x+2y=352.3x+2y=18x+y=753.2x-5y=1x+y=354.x+8y=4425x+6y=48055.3x-2y=57x-4y=1156.3x-5y=22x-y=357.4x-3y=182x-y=858.x-2y=5x+3y=-559.3x+y=72x+3y=760.3x-2y=72x-3y=3