You will get the brainliest

I won't be able to solve the entire question but I will give you the formula and show you how to find the answer

4) 1.65x + 1.36y = 118.17 (i)

x + y = 79. (ii)

From the (i) equation you get

1.65x = 118.17 - 1.36y

x = (118.17 - 1.36y)/1.65 (iii)

Substituting the value of (iii) in (ii)

(118.17-1.36y)/1.65 + y = 79

When you solve it you will get the answer

After that find the value of x and y and multiply them by 1.65 and 1.36 respectively.

Then find their difference and see which class sold more and by how much.

Hope this helps you!

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

simplifying

5(x + -6) = 2(x + 3)

reorder the terms:

5(-6 + x) = 2(x + 3)

(-6 * 5 + x * 5) = 2(x + 3)

(-30 + 5x) = 2(x + 3)

reorder the terms:

-30 + 5x = 2(3 + x)

-30 + 5x = (3 * 2 + x * 2)

-30 + 5x = (6 + 2x)

solving

-30 + 5x = 6 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-30 + 5x + -2x = 6 + 2x + -2x

combine like terms: 5x + -2x = 3x

-30 + 3x = 6 + 2x + -2x

combine like terms: 2x + -2x = 0

-30 + 3x = 6 + 0

-30 + 3x = 6

add '30' to each side of the equation.

-30 + 30 + 3x = 6 + 30

combine like terms: -30 + 30 = 0

0 + 3x = 6 + 30

3x = 6 + 30

combine like terms: 6 + 30 = 36

3x = 36

divide each side by '3'.

x = 12

simplifying

x = 12

this should .