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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(1) Answers

Varela285

x + 3y = 7
x - 3y =1
Add the equation together
2x = 8
divide both sides by 2
x = 4
Plug 4 back in to one of the original equations to solve for y.
4 + 3y = 7
subtract 4 from both sides
3y = 3
divide both sides by 3
y = (4,1) A is the answer