Question

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Answer 1

Answer:

a) $3(3a + 2b)$

b) $5c - 3d$

Step-by-step explanation:

a) $4a + 7b + 5a - b$

Lets arrange all like terms.

$= > 4a + 5a + 7b - b$

$= > 9a + 6b$

Taking 3 common from the terms,

$= > 3(3a + 2b)$

b) $6c + 4d - c - 7d$

Lets arrange all like terms.

$= > 6c - c + 4d - 7d$

$= > 5c - 3d$

Answer 2

Answer:

9a + 6b and 5c - 3d

Step-by-step explanation:

(a)

4a + 7b + 5a - b ← collect like terms

= (4a + 5a) + (7b - b)

= 9a + 6b

(b)

6c + 4d - c - 7d ← collect like terms

= (6c - c) + (4d - 7d)

= 5c - 3d