If a = 2b + 1, then, in terms of b, what is the value of 4a - 5?

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15-10-2016
Mathematics

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If a = 2b + 1, then, in terms of b, what is the value of 4a - 5?

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Ajgirl02 Ajgirl02 · Answer 1 · 2016-10-15T18:57:36+02:00

Ajgirl02 Ajgirl02

15-10-2016

To solve this, plug 2b+1 in for a. :

4(2b+1)-5. Solve for b.

First use the distributive property:

8b+4-5=?

Combine like terms:

8b-1=?

Solve for b.

add 1 to both sides.

8b=1

Divide both sides by 8.

b=1/8

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