Question

Given that R = 4x − 9y Find x when y = 1 and R=1 ?​

Answer 1

x=2.5

Explanation:

R = 4x − 9y

We know that R=1 and y=1 so we can substitute that in

1=4x-9

Then solve as a normal algebraic equation

add 9 to both sides

10=4x

divide both sides by 4

2.5=x