Question

Repede va rog e urgent!

Aflati numerele y, z daca:
a)
$\frac{y}{27}= \frac{8}{12}$

b)
$\frac{z + 2}{2z - 1} = \frac{2}{3}$

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Answer 1

a) y=27X8/12=> y=216:12=> y=18
b) 3(z+2)=2(2z-1)=> 3z+6=4z-2=> 3z-4z= -2-6=> -z=-8=> z=8

Answer 2

Răspuns:

y/27= 8/12

y/27= 2/3

3y=54

y= 54/3

y= 18

b)

(z+2) /2z-1= 2/3

3(z+2)= 2(2z-1)

3z+6= 4z-2

3z-4z= - 2-6

-z= - 8 /×(-1)

z= 8

Explicație pas cu pas: