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# What is the value of y in the equation 6.4x+2.8y = 44.4 , when x=3?

Jul 24, 2016

$y = 9$

#### Explanation:

$6.4 x + 2.8 y = 44.4$
Multiplying both the sides by $10$
we get
$64 x + 28 y = 444$
when $x = 3$ we get value of $y$ as follows
$64 \left(3\right) + 28 y = 444$
or
$192 + 28 y = 444$
or
$28 y = 444 - 192$
or
$28 y = 252$
or
$y = \frac{252}{28}$
or
$y = 9$