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Sagot :

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

Dead3illidn

Answer:

a) [tex]3(3a + 2b)[/tex]

b) [tex]5c - 3d[/tex]

Step-by-step explanation:

a) [tex]4a + 7b + 5a - b[/tex]

Lets arrange all like terms.

[tex] = > 4a + 5a + 7b - b[/tex]

[tex] = > 9a + 6b[/tex]

Taking 3 common from the terms,

[tex] = > 3(3a + 2b)[/tex]

b) [tex]6c + 4d - c - 7d[/tex]

Lets arrange all like terms.

[tex] = > 6c - c + 4d - 7d[/tex]

[tex] = > 5c - 3d[/tex]

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