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Xһ1حʮح2Xһ1حʮح3Xһ1حʮح4Xһ1lʮح5Xһ1...

൱55һʽľֵλڵ28Сֵ x=1/7 Сֵy=27/7

⣺7x+1=15 7x=14 x=2 40-5.5x=29

|x-1l ʮحx-5ح=4(ⷽ) x>=5 x-1+x-5=4 2x=10 x=5 1

Ҫֶμ㣬: ٵ2x+3

5x+2=4(x+1) 5x+2=4x+4 5x-4x=4-2 x=2

ح5x-5ح-10=15 ح5x-5ح=25 5x-5=25 5x=25+5 x=5+1 x=6x=-4

ãĿǰۼΪ1399ԪʵǻΪȨĵ棬λ͹һµġ

2.311.5+1.57.69 =2.31+7.691.5 =101.5 =15

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