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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

72除以(9+x)=6是吗 72/(9+x)=6 等号两边同时乘以(9+x) 72=6(9+x)=54+6x 6x=72-54=18 x=3

解:依题意得算式, x-2÷8+3×9=72 x-0.25+27=72 x+26.75=72 x=72-26.75 x=45.25 即x-2÷8+3×9=72的解是x=45.25

(27+72)x72

x(x+1)=72 x²+x-72=0 (x-8)(x+9)=0 x-8=0或x+9=0 得x=8或x=-9

(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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