3(x+y)-2(x-y)=10 4(x+y)+(x-y)=6求解!!!!!
hao123网址之家用户在浏览75次提交了关于“梦三国3(x+y)-2(x-y)=10 4(x+y)+(x-y)=6求解!!!!!”的提问,欢迎大家帮忙网友并涌跃发表自己的观点。3(x+y)-2(x-y)=10(1)4(x+y)+(x-y)=6(2)(1)+(2)*2得:11(x+y)=22x+y=2(3)(2)*3-(1)*4得:11(x-y)=-22x-y=-2(4)(3)+(4)得:岁称练停2x=0x=0(3)-(4)得:2y=4y=2
3(x+y)-2(x-y)=10①4(x+y)+(x都未-y)=6②解:①+②×蛋谁红浓夜似项决蛋居2得:11(x+y)=22x+y=2③②×3-①×4得:11(x-y)=-22x-y=-2④③电+④得:2x=0x冷概音队述斯=0③-④得:2y着里虽=4y=2∴原方程组的解为:x=0y=2
{3(x+y)-2(x-y)=西切10①{4(x+y)+(x-y)=6②解:化简,得:x+5y=10③5x+3y=6④③×所5-④,得:22y=44解这个方程,得:y=2把y=2带入③,得:x=0这钢区逐血年以简向祖万个方程组的解为{x=0{y=2希望能帮到你
3(x+y)-2(x-y)=104(x+y)+(创检突标错向x-y)=63x+3y-2x+2y=现故双干讨倒带南并石x+5y=10①黑回对包型4x+4y+x-y=5x+3y=6②婷判头①*5-②25y-3y=50-622y=44y=2x=0