Answer:
x = -1
y = 3.33
Step-by-step explanation:
Isolate one term from either equation.
W'ell isolate x from the first equation.
x + 3y = 9
Rearrange:
x = 9 - 3y
Substitute this value for x into the second equation.
3x - 3y = -13
3(9 - 3y) -3y = -13
27 - 9y - 3y = -13
-12y = -40
y = 10/3 = 3.33
Substitute this value for y into the original equation.
x + 3 × (3.33) = 9
x = -1
Substitute both values into second equation to check.
3(-1) - 3(3.33) = -13
Therefore, x = -1
and y = 3.33 (or 10/3)
