Question

Y = 57.15 − 0.5 X If Y equals 5 , what is X ? Then is Y=3, what is X?

Answer 1

When y equals 5, x is 104.3

When y equals 3 then x is 108.3

Solution:

Given expression is:

$y = 57.15 - 0.5x$

If y equals 5 what is x ?

Substitute y = 5 in given expression

5 = 57.15 - 0.5(x)

5 = 57.15 - 0.5x

0.5x = 57.15 - 5

0.5x = 52.15

Divide both sides by 0.5

x = 104.3

Thus when y equals 5, x is 104.3

If y = 3 what is x ?

Substitute y = 3 in given expression

3 = 57.15 - 0.5(x)

3 = 57.15 - 0.5x

0.5x = 57.15 - 3

0.5x = 54.15

Divide both sides by 0.5

x = 108.3

Thus when y equals 3 then x is 108.3