Solve Equations
x + 18 = 42
What is x = 24
Don had 42 marbles. He lost 14 of them. Write and solve an addition equation to find how many he has left
42 = 14 + m
m= 28 marbles
Emma gets paid $10 for babysitting. She spends $2 on a package of trading cards. Write and solve an equation to show how much money Emma has left
What is x + 2 = 10 x = 8
2x = 22
What is x=11
The girls long jump record at Ella's school is 18 feet 2 inches. Ella's longest jump is 17 feet 8 inches. Write an equation that represents how much farther Ella has to jump to equal the long jump record. Solve the equation.
Long jump record = 18 feet 2 inches or (18 X 12 + 2, which is 218 inches).
Ella's longest jump = 17 feet 8 inches or (17 X 12 + 2, which is 212 inches).
x = 218 inches - 212 inches
x = 6 inches (to equal the record)
Shannon has $6 more than twice the amount of money that Dave has. If Shannon has $14, write an equation and solve how much money Dave has.
x represents the amount of money Dave has
6 + 2x = 15
x=
The class must raise at least $50 to go on a field trip. They have collected $10. Write an equation to show how much the class still needs to collect to go on the trip. Solve the equation.
x = what the class still needs to collect
x = $50 - $10
x = $40
Solve:
5 1/4 = T + 2 1/2
get variable T by itself by subtracting
2 1/2 on both sides
5 1/4 - 2 1/2 = T + 2 1/2 - 2 1/2
5 1/4 - 2 1/2 = T
21/4 - 5/2 = T
21/4 - 10/4 = T
11/4 = T
Jet hit 2 home runs in the game. He was walked 3 times in the game. Which equation below best represents how many time Jet got to bat during the game? Solve the equation.
a) b = 2 X 3
b) b = 3 - 2
c) b = 3 / 2
d) b = 2 + 3
d) b = 2 + 3
b = 5
The elevator has a weight limit 1,200 pounds. There are 3 people on the elevator who each weigh 200 pounds. Write an equation to represent how much more weight the elevator can hold without going over the limit.
w = the amount of remaining weight the elevator can hold
x = 1200 - 3(200)
x = 1200 - 600
x = 600 more pounds the elevator can hold
0.55s = 2.75
What is s = 5
Solve: 3y = 21
get the variable y by itself:
3y = 21 (opposite of multiplication is division)
3y / 3 = 21 / 3
y = 3
Solve the equation:
4y = 2 1/4 + 5 3/6
get common denominators for the fractions:
4y = 9/4 + 33/6
4y = 27/12 + 66/12
4y = 93/12
y = 93/12 divided by 4
y = 93/12 X 1/4
y = 93/48
y = 1 45/48 or 1 15/16
The perimeter of a triangle is 36 inches. The base of the triangle is 20 inches. The other 2 sides have an equal length. Write and solve and equation that represents the length of the other 2 sides.
2s = 36 - 20
2s = 16 (divide both sides by 2)
s = 8