5a-75=-20(a+20)

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Solution for 5a-75=-20(a+20) equation:


Simplifying
5a + -75 = -20(a + 20)

Reorder the terms:
-75 + 5a = -20(a + 20)

Reorder the terms:
-75 + 5a = -20(20 + a)
-75 + 5a = (20 * -20 + a * -20)
-75 + 5a = (-400 + -20a)

Solving
-75 + 5a = -400 + -20a

Solving for variable 'a'.

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

Add '20a' to each side of the equation.
-75 + 5a + 20a = -400 + -20a + 20a

Combine like terms: 5a + 20a = 25a
-75 + 25a = -400 + -20a + 20a

Combine like terms: -20a + 20a = 0
-75 + 25a = -400 + 0
-75 + 25a = -400

Add '75' to each side of the equation.
-75 + 75 + 25a = -400 + 75

Combine like terms: -75 + 75 = 0
0 + 25a = -400 + 75
25a = -400 + 75

Combine like terms: -400 + 75 = -325
25a = -325

Divide each side by '25'.
a = -13

Simplifying
a = -13

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