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Read and understand the problem and verbal sentences below.
1. A number increased by 5 is 12. What is the number?
2. The sum of two numbers is 8. If the first number is 3. what is the second
number?
3. Shirly is 2 years older than Eda. The sum of their ages is 20. Find their present
ges
If we let x be the unknown number, how can these sentences be translated into
mathematical equations? What is the value of xP​

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Answer:

1. x + 5 = 12

x = 12 - 5

x = 7

2. x + y = 8

x = 3

y = 8 - 3

y = 5

3. S = 2 + E

S + E = 20

2 + E + E = 20

2 + 2E = 20

2E = 18

E = 9

S = 2 + 9

S = 11

EDA = 9 years old

Shirly = 11 years old

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