75=-5[a+5]

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Solution for 75=-5[a+5] equation:


Simplifying
75 = -5[a + 5]

Reorder the terms:
75 = -5[5 + a]
75 = [5 * -5 + a * -5]
75 = [-25 + -5a]

Solving
75 = -25 + -5a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '5a' to each side of the equation.
75 + 5a = -25 + -5a + 5a

Combine like terms: -5a + 5a = 0
75 + 5a = -25 + 0
75 + 5a = -25

Add '-75' to each side of the equation.
75 + -75 + 5a = -25 + -75

Combine like terms: 75 + -75 = 0
0 + 5a = -25 + -75
5a = -25 + -75

Combine like terms: -25 + -75 = -100
5a = -100

Divide each side by '5'.
a = -20

Simplifying
a = -20

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