解: 1.6x =2.4 1.6x÷1.6 =2.4÷1.6 x =1.5
解: 25x =400 25x÷25 =400÷25 x =16
解: 2.7x =1.62 2.7x÷2.7 =1.62÷2.7 x =0.6
解: 7x-68 =37 7x-68+68 =37+68 7x =105 7x÷7 =105÷7 x =15
解: 0.9x+9.2 =20 0.9x+9.2-9.2 =20-9.2 0.9x =10.8 0.9x÷0.9 =10.8÷0.9 x =12
解: 12x-56 =124 12x-56+56 =124+56 12x =180 12x÷12 =180÷12 x =15
|
|