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0.9x÷13.5=0.2

0.9x÷13.5=0.2 0.9x=13.5×0.2 x=27÷0.9 x=30

16.2-0.9x=13.5解方程 解:原方程即: 0.9x=16.2-13.5 0.9x=2.7

(4x+5)x0.9=13.5 4x+5=13.5÷0.9 4x=15-5 4x=10 x=

13.9x5.2-3.9x5.2 =(13.9-3.9)×5.2 =10×5.2 =52 1.25x

(1)X:6/13=3.25:3+1/2 7/2X=6×3.25/13 X=19.5/13×2/7=

(46)22.2-4.8+3.2-12=8.6 (47)0.3×5+3-4.5=0 (48)2x1.

5.3x-0.9=13.2 5.3x=14.1 x=14.1/5.3=141/53

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