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20 1 1 Chongqing senior high school entrance examination math problems
Find the value of x first, x? -X- 1=0, so use the radical x = (1 radical number five) ÷2.

The first simplified formula is (X+ 1)÷(2X- 1), so finally.

When X=( 1+ radical number 5)÷2, the original formula =( 15+3× radical number 5) ÷ 10.

When X=( 1- radical number 5) ÷2 is the original formula =(4+ radical number 5)÷2.

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