Question

A small order of fries at Wendy’s has 90 more calories than the small order of fries at McDonald’s. If together they have 550 calories, how many calories are in the Wendy’s small order of fries?

Answer 1

• 320 calories

Explanation:

Small order of fries at Wendy’s = x calories

Small order of fries at McDonald’s = y calories

• x = y + 90
• x + y = 550

Substitute x in the second equation

• y + 90 + y = 550
• 2y = 550 - 90
• 2y = 460
• y = 230

Then, x is:

• x = 230 + 90 = 320 calories