1)方程两边同时乘以x²+2x,得3x+x+2=4解得x=1/22) 方程两边同时乘以12,得4(1-x)=36-3(x+2)即4-4x=36-3x-6解得x=-26 对您有帮助请采纳!不明白请继续追问!祝学习进步!
①3/(x+2 )+1/x=4/(x²+2x)两边同乘以(x²+2x):3x+(x+2)=44x=2x=1/2 (2)(1-x)/3=3-(x+2)/4两边同乘以12:4×(1-x)=36-3×(x+2)4-4x=36-3x-6x=-26