x+30=5/6️乘3/2xx+30=15/12xx+30=5/4x1/4x=30x=30乘4x=120这个方程最后的解x=120
X+30=5/6×3/2XX+30=(5/6×3/2)XX+30=5/4X30=5/4X-X(5/4-1)X=301/4X=30X=30×4X=120