coffee shop sells small and large coffee. Each day they sell 510 cups of coffee. If the shop sells 3 times as many large cups as small cups of coffee, How many cups of each size do they sell daily?

Answer 1

L = 3S

L + S = 510

Substitute 3S for L in the second equation and solve for S. Insert that value into the first equation to solve for L. Check by putting both values into the second equation.