Find the value of expression:
3a - 4b - 8 + 5a + 2b, if a = 3 and b = 7.

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Solution

Put a = 3 and b = 7 in the expression 3a - 4b - 8 + 5a + 2b.

3 × 3 - 4 × 7 - 8 + 5 × 3 + 2 × 7
= 9 - 28 - 8 + 15 + 14
= 2

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Similar questions

Find the value of: $3 a - 2 b$ $w h e n a = 8, b = 10$

2 a - [3 a + 4 b - (2 a - b) + 5 a - 7 b]

3 a - 2 b, w h e n a = 8, b = 10

\frac{5 a + 2 b}{5 a - 2 b} = \frac{5}{3}

:

= 2 : 5

(3 a + 4 b) : (5 a + 6 b)

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