x+150=290 79.4+x=95.5 x+55=129
x+3=18 x+32=76 100+x=310
4.5 x =90 5 x =100 6.2x=124 1.8x=0.972
7 x =49 20x=40 8x=8 1.2x=81.6
x－54.3=100 x－77=275 x－58=144
x－6=12 x－7.6=8 x－5.3=3.49
x÷2.5=100 x÷3=33.3 x÷2.2=8 x÷6=12
66－x=32.3 77－x=21.9 99－x=61.9
88-x=80 43－x=38 54－x=24
7÷x=0.001 56÷x=5 39÷x=3
所需点数：0
