展开 3x+4(2-x=4x+5)

解答

展开

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

- x + 8 = 4 x + 20

求解步骤

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

= 3 x + 4 (2 - 4 = xx + 5)

乘开

4 (2 - x = 4 x + 5) : 8 - 4 x = 4 x + 20

3 x + 8 - 4 x = 4 x + 20

乘开

3 x + 8 - 4 x : - x + 8

- x + 8 = 4 x + 20

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