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High School Mathematics
1.11 Applications of Simple Equations

Example: "Some number added to 7 gives 11," convert this word problem into a symbolic statement.
Solution:
Let the number be 'x'.
If x is added to 7, we get x+7.
According to the problem statement, this sum is equal to 11.
Therefore, symbolically the statement is x+7 = 11.
Directions: Convert the following word problems into symbolic statements. Also write at least 10 examples of your own.

Name: ___________________

Date:___________________

High School Mathematics
1.11 Applications of Simple Equations

Q 1: 50 reduced by some number gives 45.
50 - x = 45
x = 50 - 45
x - 50 = 45
45 - x = 50

Q 2: 75 reduced by some number gives 37.
37 - x = 75
x = 75 - 37
x - 75 = 37
75 - x = 37

Q 3: Some number added to 20 gives 11.
x + 20 = 11
20x = 11
x = 20 + 11
x + 11 = 20

Q 4: Twice a number gives 64.
x = 64*2
x + 2 = 64
2/x = 64
2x = 64

Q 5: Some number added to 11 gives 20.
x + 11 = 20
11x = 20
x = 11 + 20
x + 20 = 11

Q 6: 7 times a number gives 49.
7x = 49
x = 49*7
x + 7 = 49
7/x = 49

Q 7: Some number divided into 50 parts gives 5.
x/50 = 5
x - 50 = 5
50/x = 5
50x = 5

Q 8: Some number added to 15 gives 20.
x + 15 = 20
x = 15 + 20
15x = 20
x + 20 = 15

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