Balanced Equations
7 + 6 =
13
7 + 6 = 13
What is a variable?
An unknown number that is shown by using a letter (x, y, a, h, l, etc)
Which is an expression?
1) 3 + n
2) 3 + n = 24
The answer is 1. An expression does not have an equal sign.
What is a phase for the following expression:
7 + n
seven plus a number
Balance the equation:
9 + __ = 14
5
9 + 5 = 14
What does "n" equal?
5n = 25
n = 5
5(5) = 25
25 = 25
Write the expression from the following phrase:
Dennis shared his p marbles among his 5 friends. How many marbles did each friend receive?
p/5
What is a phrase for the following expression?
n + 2
Add two to any number
Balance the equation:
___ - 13 = 52
65
65 - 13 = 52
What does "x" equal?
21/7 = x
x = 3
21/7 = x
21/7 = 3
3 = 3
Write the expression from the following phrase:
Jimmy works 20 days in a month. If he was absent for d days last month, how many days did he work?
20 - d
What is a phrase for the following expression?
55m
Fifty-five times any number
Balance the equation:
90 + 46 = 34 x ___
4
90 + 46 = 34 x 4
136 = 136
What does "h" equal?
14 - h = 6(0)
h = 14
14 - 14 = 6(0)
0 = 0
Write an expression from the following phrase:
Dennis works for $8 per hour at a town’s bakeshop. How much money will he earn after x hours?
8x
What is a phrase for the following expression?
15/c
Fifteen divided by any number
Is the following equation balanced?
17 x 2 = 36
No.
17 x 2 = 36
34 = 36
What does "y" equal?
29 - y = 2(6)
y = 17
29 - 17 = 2(6)
12 = 12
What is the expression for the following phrase?
Chloe drives 65 kilometers per hour. How far will she be if she drives for t hours?
65t
What is a phrase for the following expression?
45 - r
the difference between 45 and r
18/2 = 3times3
Is the following equation balanced?
Yes
18/2 = 3times3
9 = 9
What does "w" equal?
8w = 50 - 2
w = 6
8(6) = 50 - 2
48 = 48
What is the expression for the following phrase?
the sum of seventy-seven and a number t
77 + t
What is a phrase for the following expression?
3h + 9
A number multiplied by 3, and then nine added
4 , 2, 10, 5
4 x 5 = 2 x 10
20 = 20
Create an equation with the following:
r, 5, 30, 7
5 x 7 = 30 + r
What is the expression to the following phrase?
Multiply any number by 2, and then add 3.
2n + 3
What is a phrase for the following expression?
n/4 - 2
the quotient of a number and 4, and then subtract 2.
Write a balanced equation using the following numbers:
7, 30, 3, 9
7 x 3 = 30 - 9
21 = 21
If "c" = 6, which of the equations would be balanced?
1) 7c = 10(4)
2) 5 + c = 11 - 1
3) 10c = 65 - 5
4) 10 - 3 = c + 2
3) 10c = 65 - 5
10(6) = 65 - 5
60 = 60
What is the expression for the following phrase?
Divide any number by 2, and then add 4
n/2 + 4
What is a phrase for the following equation:
Add three to any number, and then multiply by 2
2(3 + n)