展开-x-4(-7-4x=103)

解答

展开

- x - 4 (- 7 - 4 x = 103)

15 x + 28 = 103

求解步骤

- x - 4 (- 7 - 4 x = 103)

= - x - 4 (- 7 - 4 \cdot 103 = x)

乘开

- 4 (- 7 - 4 x = 103) : 28 + 16 x = 103

- x + 28 + 16 x = 103

乘开

- x + 28 + 16 x : 15 x + 28

15 x + 28 = 103

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