00:01
What we're saying here is we're going to have x gallons of 25%, and we're going to have a certain amount of gallons of 35%.
00:16
And ultimately, we're going to have 20 gallons of 32%.
00:28
So if i call this x and this y, we know that our gallons of x plus our gallons of 1 ,000, y is going to have to equal 20 gallons total.
00:46
And so, and we also know that what we're really doing up here is multiplying.
00:54
We're saying x times 25 % plus y times 35 % is going to give us 20 times 32%.
01:09
So if i write this a little bit clearer, we can say 0 .25x plus 0 .0 .25x plus 0 .0 .0 .0.
01:17
35y equals 20 times 0 .32, 6 .4.
01:30
So if we go up here, we can solve for one and say x equals 20 minus y.
01:39
So down here, i'm going to substitute our x and say 25, or 0 .25, we could say 0 .25 times 20 minus y equals 0 .35 times y equals 0 .35 times y equals, 6 .4.
01:59
We should be adding here...
