Question

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

Answer 1

6.4x + 2.8y = 44.4
put x = 3
6.4× 3 + 2.8y = 44.4
19.2 + 2.8y = 44.4
y = 44.4 - 19.2 / 2.8
y = 25.2 / 2..8
y = 9
I hope that this answer is correct

Answer 2

$\huge\bold{Solution}$



$6.4x + 2.8y = 44.4 \\ \\ when \: \: x = 3 \\ \\ = > 6.4(3) + 2.8y = 44.4 \\ \\ = > 19.2 + 2.8y = 44.4 \\ \\ = > 2.8y = 44.4 - 19.2 \\ \\ = > 2.8y = 25.2 \\ \\ = > y = \frac{25.2}{2.8}$

=> y = $\huge\boxed{ 9 }$



$\textbf{Hope it helps!!}$