已知关于x的方程①②③,若方程①的解比方程②的解大5,求方程③的

已知关于x的方程①,若方程①的解比方程②的解大5,求方程③的解。

答案

p;【答案】x=-4解析:
方程①的解为,所以方程②的解为-17,解得,把代入方程③,解得
 x=-4

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