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5/9+x=13/18解方程

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18-9+5x=13.5 9+5x=13.5 5x=4.5 x=0.9

解:(1+5/9)x-13/18=5/18          14/9x=1                 x=9/14

移项得25x=4.5解得x=0.18

因题干不全,无法作答

(1)x+18=34, x+18-18=34-18, x=58;(2)1724-x=13, 1724-x+x=13+x, 1724=13+x, 1724-13=13+x-13, x=924, x=38;(3)x-(13+14)=512, x-712=512, x-712+712=512+712, x=1.

4x+5x=40分之27 解:9x=27/40 x=27/40÷9 x=3/40 x-6分之5=25 解:x=25+5/6 x=25又5/6 (l+9分之5)x-18分之13=18分之5 解:14/9x=5/18+13/18 14/9x=1 x=1÷14/9 x=9/14

括号18x减6-9x括号除3=13解方程 9x-6=13x3 9x=39+6 x=45/9 x=5

24×(3/8-1/3) =24×3/8-24×1/3 =3×3-8×1 =9-8 =1 5/13-5/13×5/18 =5/13×(1-5/18) =5/13×13/18 =5/18 7/9+2/9×3/2 =7/9+3/9 =10/9 57×3/56-3/56 =( 57-1)×3/56 =56×3/56 =3 15/16×(3/5+1/3) = 15/16×3/5+15/16×1/3 =3/16×3+5/16 =9/16+5/16 ...

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