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Systems of equations, help please?
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Systems of equations, help please?

Systems of equations, help please?-example-1
User Aram Papazian
by
8.4k points

1 Answer

5 votes
4x + 3y = 54 (1)
3x + 9y = 108 (2)

Multiply (1) by (-3)
-12x - 9y = -162
3x + 9y = 108
---------------------add
-9x = -54
x = 6

plug x = 6 into (1) to find y
4(6) + 3y = 54
24 + 3y = 54
3y = 30
y = 10

Answer
(6 , 10)

Hope it helps.
User Gilles Castel
by
8.0k points
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