题目

解方程。 (1) 5.6x+8.2x=55.2 (2) 1.2x+0.8=1.4 (3) (x+65)×5=575 答案:5.6x+8.2x=55.2 解:13.8x=55.2 13.8x÷13.8=55.2÷13.8x=4 1.2x+0.8=1.4 解:1.2x+0.8-0.8=1.4-0.81.2x=0.6 1.2x÷1.2=0.6÷1.2 x=0.5 (x+65)×5=575 解:(x+65)×5÷5=575÷5x+65=115 x+65-65=115-65 x=50Looking round the town, he felt as though he ________ away for ages. [  ] A.has beenB.wasC.isD.had been
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