the unknown Write an equation For each of these situations Define a variable to

Question

the unknown Write an equation For each of these situations Define a variable to represent the value of the unknown number before writi each equation. value of these situations and then solve the equation for 2 a 17.5 is equal to 2 times some number. What is the number? bThe sum of 3 times some number and 12 is 42. What is the numbe 3. c. ofsome number is 4.3. What is the number? d. The difference between some number and 14.3 is 2.1. What is the number? e. Some number is 4 times as large as 9.8. What is the number?

Explanation / Answer

2 a) let the number = x

17.5 = 2x

x = 17.5 / 2

x = 8.75

hence, the number is 8.75

b) sum of 3 times a number and 12

3x + 12 = 42

3x = 42 - 12

3x = 30

x = 10

number is 10

c) 1/4 x = 4.3

x= 4.3 * 4

x = 17.2

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