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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

8×9=72 (9)×(8)=(72) (72)÷(9)=(8)

采纳吧

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

6x8十8xX二72……×二3

3.6X=72, X=72÷3.6, X=20, 9.8+X=9.8+20=29.8。

简便计算 7.2×8.9+72×0.11 =7.2×8.9+7.2×1.1 =7.2×(8.9+1.1) =7.2×10 =72

x=20 9.8x=196

(x-1)x=72 x^2-x-72=0 (x-9)(x+8)=0 x-9=0或x+8=0 x=9 或 x=-8

=5/9x72+6/8x72 =40+54 =94

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