Simplify these expressions and find their values if $x = 3, a = - 1, b = - 2$
$3 x - 5 - x + 9$

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Solution

Consider $3 x - 5 - x + 9$
Put $x = 3$ in given expression.
$3 (3) - 5 - 3 + 9 9 - 5 - 3 + 9 18 - 8 10$
Hence, $3 x - 5 - x + 9$ is $10$

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Similar questions

Simplify these expressions and find their values if x = 3, a = − 1, b = − 2.

(i) 3x − 5 − x + 9 (ii) 2 − 8x + 4x + 4

(iii) 3a + 5 − 8a + 1 (iv) 10 − 3b − 4 − 5b

(v) 2a − 2b − 4 − 5 + a

Question 7 (iii)

Simplify these expressions and find their values if
x = 3, a = -1, b = -2:
3a + 5 - 8a + 1

Question 7 (v)

Simplify these expressions and find their values if x = 3, a = -1, b = -2:
2a - 2b - 4 - 5 + a

Simplify these expressions and find their values if $x = 3, a = - 1, b = - 2$

$2 a - 2 b - 4 - 5 + a$

Simplify these expressions and find their values if $x = 3, a = - 1, b = - 2$

$10 - 3 b - 4 - 5 b$

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