Answer:
x = 3
y = 0
Step-by-step explanation:
x + 2y = 3 ---------eqn 1
x - y = 3 --------eqn 2
Using eqn 2 to find the value of y
x - y = 3
Making y the subject of the formula
x - 3 = y
y = x - 3
Substitute the value of y into eqn 1
x + 2y = 3
x + 2(x - 3) = 3
Open the bracket
x + 2x - 6 = 3
3x - 6 = 3
3x = 3 +6
3x = 9
Divide both sides by 3, to get value of x
3x/3 = 9/3
x = 3
To get the value of y, use eqn 2
x - y = 3
3 - y = 3
3 - 3 = y
y = 0
Hint, to know maybe the values are correct, insert the values into the equation
Let's use eqn 2
x - y = 3
x = 3
y = 0
Insert into the equation
x - y = 3
3 - 0 = 3
Our values are correct
