Solve each problem by writing and solving an equation.
in Algebra 1 Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

let s is Marys sister age and m is Marys age. According the presentation we have.

s = m + 7 (1)  and  s + m = 35 (2).  from the (2) we get  m = 35 - s plugging this value of m to (1) we get

s = 35-s+7  --->>>  2s=42  so  s=42/2 = 21  and from m=35-s we get m=35-21  so  m = 14

so marys age is 14 years and marys sister age is 21 years
by Level 5 User (13.1k points)

Related questions

Welcome to, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
85,106 questions
90,253 answers
62,120 users