nzphddr的部落格

標題:

急問數學題 10~

發問:

38. x/a+x/b=c/d find x 39.ax-b/x-d=e find x 5.-xy+4x 39. 4m-5/8m^2+4/-12m 41.4-a-2/5a 43. a^2/2a+1-a

最佳解答:

38 x/a+x/b=c/d ax+bx/ab=c/d adx+bdx=abc x(ad+bd)=abc x = abc/d(a+b) 39 ax-b/x-d=e ax-b/x=e+d ax-b=ex+dx ax-ex-dx=b x(a-e-d)=b x=b/a-e-d and you have not said what you want to find

• 請問這東東是甚麼(手機用)@1@
• 粉底液,2 way cake ,胭脂,遮暇膏,oslee@1@
• 我想問嘉勳教育的中四英文

 

此文章來自奇摩知識+如有不便請留言告知

其他解答:

38) x/a + x/b = c/d bx + ax = abc/d (multiply both sides by ab) x(a+b) =abc/d x = (abc)/(a+b)d not sure about 39, and don't know what you want for the rest.