Question 573019
This problem is about converting words into numbers.  Let's take one part at a time.


We want the sum of 7 times the number and 5 times the number to give 84
Let's make the number X.


7X + 5X = 84  Does this answer the original problem?  Read it and see.


Now let's solve:
Combining X terms:
7X + 5X = 84
12X = 84
Divide both sides by 12:
X = 84/12
X = 7


Let's check:
Does the sum of 7 times 7 and 5 times 7 equal 84?
7x7 + 5x7 = 84?
49 + 35 = 84?
84 = 84  Correct!