Elimination.... my biggest enemy
Welp let's dive in.
Elimination is sort of like subtraction BUT it's subtraction of equations.
In Elimination we want to make sure that we are looking for a common/ opposite coefficient.
If we see 5x and 5x stacked on each other, GREAT! or maybe -5x and 5x stacked on each other.
Why am I happy? Welll that just made the whole process easier. You see, if you see those stacked on top of each other, that means free elimation. You can just cancel them out because it becomes zero.
then we solve the problem same old same old.
P.S: If it's opposites coefficients we add the equations if it's the same we subract.
In your elimination, we have the same coefficients.
(yay)
so we can minus ad and ad
6c with 5c and 111 with 103
c=8
so we pick an equation and sustitute every c with 8
6*8+ad=111
48+ad=111
ad=63
questiojns? feel free to ask