Shelby made $200 from selling candy bars. Large, x, candy bars sell for $4 each and smaller, y, candy bars sell for $2 each. Write an equation to represent how many of each type of candy bars she sold to earn $200.

4x+2y=200

It's 4x + 2y = 200

Solving for variable 'x'.

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

Add '-2y' to each side of the equation.

4x + 2y + - 2y = 200 + - 2y

Combine like terms: 2y + - 2y = 0

4x + 0 = 200 + - 2y

4x = 200 + - 2y

Divide each side by '4'.

x = 50 + - 0.5y

Simplifying

x = 50 + - 0.5y