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A food truck sells salads for $\$ 6.50$ each and drinks for$\$ 2.00$ each. The food truck's revenue from selling atotal of 209 salads and drinks in one day was$\$ 836.50 .$ How many salads were sold that day?$$\begin{array}{ll}{A )} & {77} \\ {\text { B) }} & {93} \\ {\text { C) }} & {99} \\ {\text { D) }} & {105}\end{array}$$

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Okay, so for this one, we know that we have to use some sort of assistance of equations to solve this where we're separating thie the amount of money total and the number of salads and drinks because we have some values for the sounds and drinks, and we also have both totals. So you have a total of two o nine salads and drinks, and we've got the total price. So the way we want to set this up is always total is something plus something. So let's go to start out with a revenue recreation. So for the money, you know, it's going to be a total of eight. Thirty six point inside, and that's going to be equal to six point five ex posed to why? And we're just going to call X on the salads, salads, and why is going to be the drinks. Okay, so then I was going to fill in our number of salads and drink secreting Well, we already know that the total number is two a night, and that's gonna be however, many salads we sold. Plus, however many drinks we sold, so that's when the experts wine. So now you can notice that there's two equations with two unknowns. We just have to solve it out. And I'm going to do this with substitution on. I'm just going to subtract expert. Both sides give me two or nine minus X and secretive. Why and that from here, I'm just going to know that this wide and this wire the same meaning that I could take this equation substituted in right there. Once I do that, I'm going to get eight. Thirty six point five is equal to six point five x was two times two o nine minus X. Then I have to distribute them to to both the two nine of the negative X, giving me a thirty six point five people to six point five X plus two nine times, too, which is for eighteen. Mine is to X so I can combine my life terms, which means anything by connected to X and the six point five X, and that's just gonna become four point five X. And then I'm going to subtract for eighteen from both sides of the equation. So it's going to be eight thirty six point x, a thirty six point five minus four eighteen, and that's going to give me for eighteen point five. So then finally, I just have to tie both sides by five. I sleep my ex so that I get that eight X is equal to ninety three when I divide for eighteen point five by four point five. Um, So then we already said that X is the number of salads, so that's gonna be be

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