5a-21=-4(-3-3n)

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Solution for 5a-21=-4(-3-3n) equation:


Simplifying
5a + -21 = -4(-3 + -3n)

Reorder the terms:
-21 + 5a = -4(-3 + -3n)
-21 + 5a = (-3 * -4 + -3n * -4)
-21 + 5a = (12 + 12n)

Solving
-21 + 5a = 12 + 12n

Solving for variable 'a'.

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

Add '21' to each side of the equation.
-21 + 21 + 5a = 12 + 21 + 12n

Combine like terms: -21 + 21 = 0
0 + 5a = 12 + 21 + 12n
5a = 12 + 21 + 12n

Combine like terms: 12 + 21 = 33
5a = 33 + 12n

Divide each side by '5'.
a = 6.6 + 2.4n

Simplifying
a = 6.6 + 2.4n

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