Question

Please help me
how is this possible ​

Answer 1

Answer:

y:x is y/z

so, 3:7 is 3/7

i mean y/z = 3/7 (cross multiply)

i.e., 3z = 7y...

thank me

Answer 2

Answer:

as per the given attachment:

y : z = 3 : 7

y is multiplied with 7 and z is multiplied with 3

which gives,

7 × y = 3 × z

7y = 3z -------------(1)

y : z = 3 : 7

y : z is equal to y/z

3 : 7 is equal to 3/7

$\frac{y}{z} = \frac{3}{7}$

by cross multiplying, we get:

7y = 3z----------(2)

Since the equation 1 and 2 are equal.

we simply the given ratio in above method or method in the given attachment.

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