SOLUTION: Beth scored 21, 24, 15, and 21 points in the first four games of the basketball season. How many points must she score in her next game to average 20 points per game for the first

Algebra ->  Equations -> SOLUTION: Beth scored 21, 24, 15, and 21 points in the first four games of the basketball season. How many points must she score in her next game to average 20 points per game for the first       Log On


   

Question 682009: Beth scored 21, 24, 15, and 21 points in the first four games of the basketball season. How many points must she score in her next game to average 20 points per game for the first five games?
Found 2 solutions by ReadingBoosters, josmiceli:
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
%2821%2B24%2B15%2B21%2Bx%29%2F%285%29+=+20
...
%2881%2Bx%29%2F%285%29+=+20
...
Multiply both sides by 5
81 + x = 5(20)
81 + x = 100
x = 100 - 81
highlight_green%28x=19%29 points
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Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = points she must score in next game
+%28+21+%2B+24+%2B+15+%2B+21+%2B+x+%29+%2F+5+=+20+
+%28+81+%2B+x+%29+%2F+5+=+20+
+81+%2B+x+=+100+
+x+=+100+-+81+
+x+=+19+
Beth must score at least 19 to average 20 for 5 games