解关于X的方程：1/3m(m-n)=1/4(x+2m)

1/3m(m-n)=1/4(x+2m)
4m(m-n)=3(x+2m)
x+2m=4m(m-n)/3
x=4m(m-n)/3-2m要得到ax=b的形式1/3m(m-n)=1/4(x+2m)4m(m-n)=3(x+2m)4m²-4mn=3x+6m3x=6m+4mn-4m²x=(6m+4mn-4m²)/3哦，打错了，sorry是1/3m(x-n)=1/4(x+2m)1/3m(x-n)=1/4(x+2m)4m(x-n)=3(x+2m)4mx-4mn=3x+6m(4m-3)x=m(6+4n)x=m(6+4n)/(4m-3)