1又1/4-2=0.75-0.5x
因为:1又1/4比0.75大0.5,要使等式成立,2应该比0.5x也大0.5
所以0.5x应该等于1.5
所以x等于3
1又1/4-2=0.75-0.5x
解:5/4-2=3/4-(1/2)x
5/4-2-5/4+2+(1/2)x=3/4-(1/2)x-5/4+2+(1/2)x
(1/2)x=3/2
(1/2)x÷1/2=3/2÷1/2
x=3
解:
1又1/4-2=0.75-0.5x
---(5/4)-2=(3/4)-(1/2)x
---5-8=3-2x
---2x=6
---x=3.
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