Systems of equations, help please?

Question

asked Feb 7, 2019 116k views

1 Answer

Gilles Castel · Answer 1 · 2019-02-14T07:27:11+0000

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.

Systems of equations, help please?

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