Question

Given that

R
=
4
x
+
8
y

Find
y
when
x
=
4
and
R
=
32

Answer 1

R = 4x + 8y

-8y = 4x - R

-8y = 4(4) - 32

-8y = 16 - 32

-8y = -16

we divide through by -8

so now

y = 2

Hope this will help