Question

X + 3y = 7
x - 3y = 1
Solve the system of equations.

Answer 1

y = 1

x = 4

{x,y} = {4,1}

Explanation:

[2]

x - 3y = 1

+ 3y +3y

x = 3y + 1

[1]

x + 3y = 7

(3y + 1) + 3y = 7

- 1 - 1

(3y) + 3y = 6

6y = 6

6 6

y = 1

--------------------------------

x = 3y + 1

y = 1

x = 3(1) + 1

x = 4

y = 1

x = 4

{x,y} = {4,1}