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3 years ago

How to simplify 18+3(9f-13)

Mathematics

2 answers:

inysia [295]3 years ago

5 0

27f-39+18=27f-21
That is the answer enjoy

Afina-wow [57]3 years ago

3 0

(for this answer i'm gonna use 0 to make it easier
firstly you have to reoder the terms like this : 18 + 3 (-13+9f)=0
then you multiply -13 and 9f by 3 like this : 18 + (-13 x 3 + 9f x 3)=0 and it should be like this: 18 + (-39 + 27f)=0
Next you have to combine like terms which is: 18 + -39 and you will get -21 and you add it to 27f which is: -21 + 27f=0 and you have to solve for the variable f and move all the terms containing f to the left and all other terms to the right.

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Incomplete question:

$\angle CBD = 53^\circ$

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See attachment for complete question

Required

Determine the equation to find x

First, is to complete the angles of the triangle (ABC and ACB)

$\angle ABC + \angle CBD = 180$ --- angle on a straight line

$\angle ABC + 53= 180$

Collect like terms

$\angle ABC =- 53+ 180$

$\angle ABC =127^\circ$

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Collect like terms

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