Решите уравнение z-4/9z=4,5

Question

Решите уравнение z-4/9z=4,5

Answer 1

Z-(4/9)z=4.54.5=45/10z(1-4/9)=45/105/9z=45/10z=45/10*9/5=81/10=8.1 

Comments

или

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оz-4/9z =4.5

(9z-4)/9z=4.5

9z-4=40,5z

z(9-40,5)=4

z=4/(9-40.5)=4/31.5=8/63