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Fynjy0 [20]
3 years ago
11

Solve the system of equations 2r + 2s = 50 and 2r – s = 17.

Mathematics
1 answer:
WARRIOR [948]3 years ago
6 0
Eq1) 2r+2s=50
eq2) 2r-s=17

solve for s in equation2 (eq2)

-s=17-2r
s=-17+2r
Substitute s into equation1 (eq1)
2r+2(-17+2r)=50
2r-34+4r=50
6r-34=50
6r=50+34
6r=84
r=14
Substitute into either equation and solve for s
2(14)-s=17
28-s=17
-s=17-28
-s=-11
s=11
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A jazz concert brought in $119000 on the sale of tickets. If the tickets sold for and each, how many of each type of ticket were
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The question is partly incomplete as it didn't state the cost of ticket sold. Also, it didn't state the total number of tickets sold. But, assuming that the tickets sold were $15 and $25 tickets, and the total number of tickets sold was 7500, then we say that

Let x = the number of $15 tickets sold

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