初中数学解二元一次方程组专项练习题 28.docx

初中数学解二元一次方程组专项练习题 28.docx

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初中数学解二元一次方程组专项练习题初中数学解二元一次方程组专项练习题28a4b135x7y193a2b6x5y14x9y1412m4b168y5x141-7m4b234a9b176x9y-47a9b166x7y-27x6y1830.9x0.5y1.63y8x1830.8x0.6y0.4a5b84x3y66a8b107x9y146x8y1655m2b14y5x165-7m2b192a4b202x3y4a8b196x6y-59x8y1750.7x0.2y3.73y6x1750.2x0.5y23a9b117x3y57a8b7x3y163x4y88m3b133y6x88-7m3b17a3b73x7y79a5b206x5y-108x6y230.9x0.6y0.33y9x230.3x0.3y1.94a4b169x9y78a3b2x2y23x7y135m8b99y6x13-3mb102ab23xy64a4b83x6y106x6y1880.4x0.4y1.3y4x1880.8x0.1y0.66a4b35x7y64a3b129x2y144x8y1269m9b278y7x126-2mb113a7b17x9y67a9b47x9y-36x4y1230.1x0.8y2.38y9x1230.8x0.2y1.5a3b18x2y96a6b46xy16x4y394m8b197y2x39-6m4b226ab106xy09a3b62x5y72x2y1820.9x0.7y0.9y7x1820.2x0.6y0.74a4b105x5y85a5b38x9y72x3y896m4b177y3x89-8m7b87a6b92x3y-93a3b114x6y-66x6y410.2x0.6y0.96y8x410.3x0.2y1.57ab28x6y103a6b136xy135x7y1604m9b25yx160-5m4b18a8b185x5y22a4b65x7y-24x7y1110.3x0.3y3.57yx1110.2x0.7y1.67a3b163x9y68a2b132x6y195xy1479mb57y9x147-1m7b16a3b194x9y-19a5b12xy39x9y1920.7x0.6y2.12y9x1920.4x0.5y1.7