3. 21 - 3 (x - 7) = x + 20 solve the following equation
Answers
Answered by
1
21 - 3 (x - 7) = x + 20
21 - 3x + 21 = x + 20
42 - 3x = x + 20
42 - 20 = x + 3x
22 = 4x
x = 22/4
x = 11/2
Answered by
10
Given :
- An equation 21 - (x - 7) = x + 20
To Find :
- Value of x.
Solution :
Let's solve the equation
→ 21 - (x - 7) = x + 20
→ 21 - x + 7 = x + 20
→ 21 + 7 - x = x + 20
→ 28 - x = x + 20
→ 28 - 20 = x + x
→ 2x = 8
→ x = 8/2
→ x = 4
.°. Value of x is 4
Verification :
→ 21 - (x - 7) = x + 20
Put the value of x
→ 21 - (4 - 7) = 4 + 20
→ 21 - (-3) = 4 + 20
→ 21 + 3 = 4 + 20
→ 24 = 24
Hence, verified !
Similar questions