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Plz help no guessing-example-1
User Kaleissin
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1 Answer

3 votes
Question asks for elimination method to solve
7x+6y=44 ..................(1)
7x-6y=-16...................(2)

What makes this question easy to eliminate is that the coefficients of x and y in both equations are 7 and 6.

(1)+(2) =>
7x+6y+7x-6y = 44-16
simplify
14x=28
x=2

Then for y,
(1)-(2)
7x+6y-(7x-6y) = 44-(-16)
distribute
7x+6y-7x+6y = 44+16
simplify
12y=60
y=5

So solution is x=2, y=5, or (2,5) is the intersection point of the two lines.

User Merlin Denker
by
7.7k points

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