Question

Given that

R
=
3
x
+
9
y

Find
x
when
y
=
6
and
R
=
7

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

Answer 1

Explanation:

R = 3x + 9y

When y = 6 and R = 7

7 = 3x + 9.6

7 = 3x + 54

7 - 54 = 3x

-47 = 3x

x = -47/3