Answer:
x+9
Step-by-step explanation:
the sum is the answer to an addition question
"a number" is a variable (I chose x, but it can be pretty much anything you'd like :)
so, the sum of a number and 9 would be x+9 because you are adding "a number" and 9
Answer:
Find the Equation of a Line Given That You Know Its Slope and Y-Intercept. The equation of a line is typically written as y=mx+b where m is the slope and b is the y-intercept. If you know the slope (m) any y-intercept (b) of a line, this page will show you how to find the equation of the line.
7x-y=14 :add 'y' to both sides
7x=14+y :divide both sides by 7
x=(14+y)/7 or x=2+(y/7)
Answer:
x= 7
Step-by-step explanation:
11x-2 = 75
11(7) - 2
77 - 2 = 75
x= 7