Question

the sum of 42 and a number x is 51

Answer 1

Answer:

x = 9

Step-by-step explanation:

"The sum of 42 and a number x is 51" in "mathy" words:

42 + x = 51

Then, subtract both sides by 42:

42 + x - 42 = 51 - 42

So

x = 9