At the bake sale a total of 540 cookies and brownies were sold for a total of $750.00 Brownies cost $ 1.00 each and cookies cost $0.35 each. Write a system of equations for this situation

x + y = 540

x + 0.35y = 750

Step-by-step explanation:

The x represents the brownies and y represents cookies. They both add up to 540, hence the first equation. Also, the prices add up to $750. The x doesn't need a coefficient since it is a dollar a piece. But, since the cookies cost 35 cents a piece, they need a coefficient.

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

step-by-step explanation:

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