Advertisements
Advertisements
Question
Simplify the expression and find the value if x is equal to 2:
3 (x + 2) + 5x - 7
Sum
Advertisements
Solution
3 (x + 2) + 5x - 7
= 3x + 6 + 5x - 7
= 3x + 5x + 6 - 7
= 8x - 1
Putting x = 2 we get,
= (8 × 2) - 1
= 16 - 1
= 15
shaalaa.com
Is there an error in this question or solution?
RELATED QUESTIONS
Find the value of the following expression, when x = −1:
2x - 7
If a = 2, b = −2, find the value of a2 + ab + b2.
If x = 4, evaluate:
3x + 8
If x = 10, evaluate:
6x2 – 25x
If x = – 6, evaluate:
2x3
If x = 8 and y = 2, evaluate:
9xy
If x = 8 and y = 2, evaluate:
5x2y
If y = 5 and z = 2, evaluate:
100yz
If m = 9 and n = − 2, evaluate (2n)3
If x = − 5 and y = − 8, evaluate:
4xy
