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Solve the system of equations and choose the correct order pair.

2x +4y=14
3x+12y=51

-3,20
-3,5
-1,3
-1,12

User Thoeni
by
5.0k points

2 Answers

5 votes

Answer: a 3,5

Step-by-step explanation:

pex

User Dagge
by
4.9k points
4 votes


(2x + 4y = 14) / 2 = x + 2y = 7
making x the subject

x = 7 - 2y
substitute into second equation

3(7 - 2y) + 12y = 51
by solving, y=5

substitute into first equation

2x + 4(5) = 14
by solving, x=-3

Therefore the ordered pair is (-3,5)

User Nikodz
by
5.4k points
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