Question

Given that
R
=
4
x
+
4
y

Find
x
when
y
=
9
and
R
=
6

Give your answer as an improper fraction in its simplest form.

Answer 1

Given,

$r = 4x + 4y$

When y=9 & r=6

$6 = 4x + 36$

or,

$4x = - 30$

or,

$x = \frac{ - 15}{2}$