Mathematics
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43

x + 3y = 7 x - 3y = 1 Solve the system of equations. A) x = 4, y = 1 B) x = 1, y = 4 C) x = - 2 3 , y = 3 D) x = 3, y = - 2 3

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(2) Answers
Ashston2011

X + 3y = 7  x - 3y = 1 x + 3y = 7    - 3y    -3y x = 7 - 3y x - 3y = 1 7 - 3y - 3y = 1 7 -6y = 1 -7         -7 -6y = -6 y = 1 Now solve for x X + 3y = 7 x + 3 = 7 x = 4 Now we have our values:- x = 4 and y = 1 Answer: A) x = 4, y = 1

Jayda

x+3y=7 x-3y=1 add them together x+3y=7 x-3y=1 + 2x+0y=8 2x=8 divide 2 x=4 subsitute x+3y=7 4+3y=7 subtract 4 3y=3 divid 3 y=1 x=4 y=1 answer is A

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