4x-5与3x-6得值互为相反数4x-5=-（3x-6）7x=6-(-5)=11x=11/7代数式k+1/3的值比3k+1/2的值小13k+1/2-(k+1/3)=12k=1-1/2+1/3=1/6k=1/12x=2/3是方程3（m-3/4x）+3/2x=5m的解3(m-3/4*2/3)+3/2*2/3=5m2m=-1/2m=-1/4...