1) 5x2-55=90
+55 +55
2) 10x=145
/10 /10
x=14.5
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-86
90% of 55= 90% * 55= 0.9 * 55= 49.5
55% of 90= 55% * 90= 0.55 * 90= 49.5
Well, darling, if you want to solve for "blank," you simply divide 90 by 120. So, 90 divided by 120 equals 0.75. There you have it, sweetie, the answer to your little math problem.
The average of 55 and 90 is 72.5