Solving
Equations
Equations
Solve for x:
x+5=12
x=7
Write an equation to represent:
"Three times a number n is equal to 21"
3n=21
John had x amount of marbles, and he lost 5. Now he has 7 marbles. How many marbles did he have? Write an equation to represent this situation
x-5=7
Solve for Y:
Y-8=2
Y=10
Write an equation to represent:
"A number x increased by 7 is equal to 15"
x+7=15
Jessica splits the total amount of cookies, c, that she has between her 4 friends. Each friend gets 3 cookies. Write an equation involving c to show how many cookies Jessica had.
c/4= 3
Solve for Z:
3z=15
Z=5
Write an equation to represent:
"The quotient of a number b and 6 is equal to 4"
b/6=4
Tommy scored 16 points in a basketball game. His score was two-thirds of the number of points that Danny scored. Let n be the number of points that Danny scored. Write an equation involving n to determine Danny's points.
(2/3)n = 16
Solve for a:
a/4=7
a=28
Write an equation to represent:
"The product of a number k and 7 is equal to 21"
7k=21
Gregory signed up for a new streaming service. The service cost him $40.20 for 6 months. Let s be the price of a single month. Set up an equation using s and solve it for the price of a single month.
6s = $40.20
s = 6.7Solve for b:
2b+5=11
b=3
Write an equation to represent:
"Two times a number, p, minus 3, is equal to 9"
2p-3=9
Barbara is sorting her book collection into shelves that hold 5 books each. She fills 8 shelves with books. Let b be the total number of books Barbara has. Write an equation involving b and solve it for the total number of books Barbara has.
b/5 = 8
b=40