It is subtracing and adding linear expressions 12(−4x+8)−14(8x−12)

Step-by-step explanation:

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i have attached a screenshot with the equation.

a = -5

explanation:

before we begin, remember the following:

-ve * -ve = +ve

+ve * +ve = +ve

-ve * +ve = -ve

+ve * -ve = -ve

now, for the given equation, we have:

- (5 - (a+1)) = 9 - (5 - (2a-3))

start by resolving the inner brackets, this will give:

- (5 - a - 1) = 9 - (5 - 2a + 3)

now, gather like terms in each bracket. this will give us:

- (4 - a) = 9 - (8 - 2a)

then, resolve the brackets on both sides, this will give us:

-4 + a = 9 - 8 + 2a

gather like terms:

-4 + a = 1 + 2a

subtract "a" from both sides:

-4 + a - a = 1 + 2a - a

-4 = 1 + a

finally, subtract "a" from both sides of the equation:

-4 -1 = 1 + a - 1

-5 = a

hope this : )