-5[4a+6]=-21

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Solution for -5[4a+6]=-21 equation:


Simplifying
-5[4a + 6] = -21

Reorder the terms:
-5[6 + 4a] = -21
[6 * -5 + 4a * -5] = -21
[-30 + -20a] = -21

Solving
-30 + -20a = -21

Solving for variable 'a'.

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

Add '30' to each side of the equation.
-30 + 30 + -20a = -21 + 30

Combine like terms: -30 + 30 = 0
0 + -20a = -21 + 30
-20a = -21 + 30

Combine like terms: -21 + 30 = 9
-20a = 9

Divide each side by '-20'.
a = -0.45

Simplifying
a = -0.45

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