Then we get the equation: 4x – 4y = 4 ... (3)
Add Equation (1) and (2) to eliminate y, because the coefficients of y are the same.
So, we get
(3x + 4x) + (4y – 4y) = 10 + 4
7x = 14
x = 2
Substituting this value of x in (1), we get