00:01
Here we are given system of the equation.
00:02
The equation 1 is x plus 2y is equal to minus 1.
00:07
Second equation is 2x plus y is equal to 4.
00:12
Here we use substitution method.
00:14
When we use substitution method, we solve either of the equation 1 or 2, either of the variable x or y.
00:21
Here we solve equation 2 for y, that is y is equal to 4 minus 2x.
00:27
Now we will substitute the value of y into the equation 1.
00:30
We get x plus 2 times 4 minus 2x is equal to minus 1.
00:39
Now simplify x plus distribute 2 over the parenthesis, 8 minus 4x is equal to minus 1.
00:48
Now combine the like terms x minus 4x, that is minus 3x plus 8 is equal to minus 1...