00:01
We need to solve the following system of equations.
00:04
So we need to cancel out one of our variables.
00:07
So i'm going to cancel out the xes by making them 110 and one a positive 10.
00:12
So we're going to make this multiplied by 5, and we're going to multiply the bottom one by negative 2.
00:17
So this becomes 10x plus 25y is equal to 40.
00:24
Then we have negative 10x minus 16y is equal to negative 20.
00:30
So our x is cancel out.
00:32
25 minus 16 becomes 9y.
00:36
40 minus 20 is 20.
00:38
We divide both sides by 9, and we get y is equal to 20 over 9.
00:45
We take that and plug it back into one of the original equations.
00:49
So 2x plus 5 times 20 over 9 is equal to 8.
00:54
So we get 2x is equal to 100, i'm not equal, plus 5 times...