Question

Write and solve an equation.

Mark weighs 75 pounds. Together, he and his sister weigh 10 pounds more than two times the weight of his sister. What is the weight, w, of Mark’s sister

Answer 1

• Mark’s sister weights 65 pounds

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Mark's weight is 75 pounds ad his sister's weight is w.

Together, he and his sister weigh 10 pounds more than two times the weight of his sister,

Set up equation:

• 75 + w = 10 + 2w

Solve it for w:

• 75 + w = 10 + 2w
• 2w - w = 75 - 10
• w = 65