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(8+9)x+72=98怎么算

(8+9)x+72=98 17x+72=98 17x=98-72 17x=26 x=26÷17 x=26/17

(x-9)(x+8) =x(x+8)-9(x+8) =x²+8x-9x-72 =x²-x-72

解:8×9=72x+8×2 72=72x+16 72x=56 x=56÷72 x=7/9

采纳吧

方法一:9(x+5)=72,9x+45=72,9x=27,x=3 方法二:x+5=72/9,x+5=8,x=3

=72×(72÷9) =72×8 =576

解: x + 15 + x = 72 2x = 72 - 15 2x = 57 x = 57 ÷ 2 x = 28.5

2.9x+x=72.15 3.9x=72.15 x=72.15÷3.9 x=18.5 , 你好,本题已解答,如果满意 请点右下角“采纳答案”。

98x36十72 =98x36十2x36 =(98+2)x36 =100x36 =3600

(x+1)²+8=72 (x+1)²=72-8 (x+1)²=64 x+1=±8 x=-1±8 x1=-1+8=7 x2=-1-8=-9

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