1.4×+9.8=22.41.4x=22.4-9.81.4x=12.6x=12.6/1.4x=92(族袭轮×-禅纳3)=11.6 x-3=5.8x=5.8+3x=8.8 13×-×=144 12x=144x=144/兆信12x=12 68-4.4×=244.4x=68-244.4x=44x=44/4.4x=10