Question

Y = 4x + 9 y = 2x + 15
please be quick with this one

Answer 1

The solution is x = 3 and y = 21

Explanation:

Here, we want to solve the system of linear equations, simultaneously

Since we have 2 y

Then we can equate both and that gives;

4x + 9 = 2x + 15

4x-2x = 15-9

2x = 6

x = 6/2

x = 3

To get y, we simply substitute x into any of the equation

That will be;

y = 2(3) + 15

y = 6 + 15

y = 21