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How do you solve #18-(2a-5)-2(a+2)=3a+5#?

Answer 1

Eva Adamson

#a = 2#

The following form presents the given equation:

#18 - (2a - 5) - 2(a + 2) = 3a + 5#

Thus, the equation above can be simplified to:

#18 - 4a + 1 = 3a + 5#

By changing the terms in the equation above, one can obtain:

#18 + 1 -5 = 3a + 4a#

#14 = 7a#

Thus,

#a = 14/7 = 2#

Many thanks for everything, and best of luck to all of you.

Canada's Hamilton, Ontario, Dr. Mamdouh Younes

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Answer 2

Jameson Allen

To solve the equation 18 - (2a - 5) - 2(a + 2) = 3a + 5:

Distribute the negative sign inside the parentheses: 18 - 2a + 5 - 2(a + 2) = 3a + 5
Distribute the negative sign outside the parentheses: 18 - 2a + 5 - 2a - 4 = 3a + 5
Combine like terms: 18 + 5 - 4 - 4a = 3a + 5
Combine like terms again: 23 - 4a = 3a + 5
Move variables to one side and constants to the other: 23 - 5 = 3a + 4a
Simplify: 18 = 7a
Solve for 'a': a = 18/7

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.