SOLUTION: Mindy designs 3 times as many ads as Alex. Cara designs 9 ads more than Mindy. They design 58 ads altogether. How many ads does Alex design? Marilu8156Avila@gmail.com

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Mindy designs 3 times as many ads as Alex. Cara designs 9 ads more than Mindy. They design 58 ads altogether. How many ads does Alex design? Marilu8156Avila@gmail.com      Log On

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Question 1095541: Mindy designs 3 times as many ads as Alex. Cara designs 9 ads more than Mindy. They design 58 ads altogether. How many ads does Alex design?

Marilu8156Avila@gmail.com

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = the number that Alex designs
+3x+ = the number that Mindy designs
+3x+%2B+9+ = the number that Cara designs
-----------------------------------------
+x+%2B+3x+%2B+3x+%2B+9+=+58+
+7x+%2B+9+=+58+
+7x+=+49+
+x+=+7+
-------------
Alex designs 7 ads
--------------------
check:
+7+%2B+21+%2B+21+%2B+9+=+58+
+58+=+58+
OK