Find the sum of :

2a + 4b +7, 8a – 3b + 3 and -5a – 8b – 5

15a – 15b – 15

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15a – 15b -5

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5a -7b + 5

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5a – 7b +15

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Solution

The correct option is C
5a -7b + 5

2a + 4b + 7 + 8a – 3b + 3 -5a – 8b -5

= (2a + 8a – 5a) + (4b – 3b – 8b) + ( 7 + 3 – 5)

= 5a – 7b + 5

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Similar questions

Simplify the following :

$(i) {(5 a - 8 b)}^{2} - {(5 a + 8 b)}^{2}$

$(i i) {(2 a + 3 b)}^{2} - ((2 a + 3 b) (2 a - 3 b))$ [4 MARKS]

(2 a + 3 b) (5 a + 4 b)

5 a + 8 b = 9

2 a + 3 b = 4

\frac{5 a + 3 b}{2 a - 3 b} = \frac{23}{5}

:

\frac{5 a + 3 b}{2 a - 3 b} = \frac{23}{5}

a : b

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