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milkiwey47
@milkiwey47
July 2022
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10/(z+3) = 100/(5z-7)
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kolobok19702009
10*(5z-7)/z+3-100*(z+3)/(z+3)(5z-7)=0
50z-70-100z-300/(z+3)(5z-7)=0
-50z-370/(z+3)(5z-7)=0
-50z-370=0
-50z=370
z=370:(-50)
z=-7.4
2 votes
Thanks 1
milkiwey47
А почему z+3 -100×(z+3) и тд.?
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Answers & Comments
50z-70-100z-300/(z+3)(5z-7)=0
-50z-370/(z+3)(5z-7)=0
-50z-370=0
-50z=370
z=370:(-50)
z=-7.4