find the value of - 20/3 of 3m
Answers
Answer:
-20/3×3= -20
Step-by-step explanation:
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Answer:
Exercise 2.1
Solve the following equations:
Question 1:
x - 2 = 7
Solution:
Given, x – 2 = 7
By adding 2 to both sides, we get
x – 2 + 2 = 7 + 2
⇒ x = 7 + 2
⇒ x = 9
Question 2:
y + 3 = 10
Solution:
Given,y + 3 = 10
By subtracting 3 from both sides, we get
y + 3 – 3 = 10 – 3
⇒ y = 10 – 3
⇒ y = 7
Question 3:
6 = z + 2
Solution:
Given,6 = z + 2
By substracting 2 from both sides, we get
6 – 2 = z + 2 – 2
⇒4 = z + 2 – 2
⇒ 4 = z
⇒ z = 4
Question 4:
Solution:
Given,
By subtracting from both sides, we get
Question 5:
6x = 12
Solution:
Given,6x = 12
After dividing both sides by 6, we get
Question 6:
Solution:
Given,
After multiplying both sides by 5, we get
Question 7:
Solution:
Given,
By multiplying both sides with 3, we get
After dividing both sides by 2, we get
Question 8:
Solution:
Given,
After multiplying both sides by 1.5, we get
Question 9:
7x – 9 = 16
Solution:
Given,7x – 9 = 16
By adding 9 to both sides, we get
After dividing both sides by 7, we get
Question 10:
Solution:
Given,14y – 18 = 13
By adding 8 to both sides, we get
14y – 8 + 8 = 13 + 8
⇒ 14y = 21
After dividing both sides by 14, we get
Question 11:
17 + 6p = 9
Solution:
Given, 17 + 6p = 9
After subtracting 17 from both sides, we get
17 + 6p – 17 = 9 – 17
⇒ 6p = –8
After dividing both sides by 6, we get
Question 12:
Solution:
Given,
By transposing 1 from LHS to RHS, we get
After multiplying both sides with 3, we get
Exercise 2.2
Question 1:
If you subtract from a number and multiply the result by , you get . What is the number?
Solution:
Let the number is m.
As per question we have
After dividing both sides by we get
By transposing to RHS, we get