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Which ordered pair (a, b) is a solution to the given system? {2a - 5b=1] {3a+5b=14}

User Jsebfranck
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2 Answers

4 votes
a = 3, b = -1, it's easier to use elimination to solve for a since the coefficients for the two b's are the same number.
User Donnior
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4 votes

Answer:

(3,-1)

Explanation:


2a - 5b=1 \ and \ 3a+5b=14

WE use elimination method to solve for a and b


2a - 5b=1


3a+5b=14

---------------------------------


5a=15

Divide by 5 on both sides

a = 3

Now plug in a=3 in first equation


2a-5b=1


2(3)-5b=1


6-5b=1

Subtract 6 on both sides

5b=-5 ( divide by 5 on both sides)

b = -1

Ordered pair is (3,-1)

User Karthik Saxena
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