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anonymous
 4 years ago
PROBLEM SOLVING USING SYSTEMS OF EQUATIONS
Roger is 13 years younger than his sister Jackie. Together the sum of their ages of 91. How old is both Roger and Jackie?
anonymous
 4 years ago
PROBLEM SOLVING USING SYSTEMS OF EQUATIONS Roger is 13 years younger than his sister Jackie. Together the sum of their ages of 91. How old is both Roger and Jackie?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0let x = jackie's age x13 = roger's age x + (x13) = 91 2x  13 = 91 2x = 106 x = 53 x  13 = 40 so Jackie is 53 years old and Roger is 40 years old.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0sorry that was 2x = 104 x = 52 x13 = 39 Jackie = 52 yrs old Roger = 39 yrs old

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so in this equation there is no y=?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0well y is just a variable. You can also use y. For example y = Jackie's age y13 = Roger's age then you repeat the whole process.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0what i ment was you dont need both y and x in the equation? y = roger x = jackie?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0oh. i see your point. okay, i'll do it your way. x = Jackie y = Roger y = x  13 x+ y = 91 using systems of linear eqautions, x + y = 13 x+y = 91 add the two equations... 2y = 78 y = 39 39 = x  13 x = 29 + 13 x = 52 was that what you meant?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes thankyou so much!
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