-8(7+4a)=-21+3a

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Solution for -8(7+4a)=-21+3a equation:


Simplifying
-8(7 + 4a) = -21 + 3a
(7 * -8 + 4a * -8) = -21 + 3a
(-56 + -32a) = -21 + 3a

Solving
-56 + -32a = -21 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-56 + -32a + -3a = -21 + 3a + -3a

Combine like terms: -32a + -3a = -35a
-56 + -35a = -21 + 3a + -3a

Combine like terms: 3a + -3a = 0
-56 + -35a = -21 + 0
-56 + -35a = -21

Add '56' to each side of the equation.
-56 + 56 + -35a = -21 + 56

Combine like terms: -56 + 56 = 0
0 + -35a = -21 + 56
-35a = -21 + 56

Combine like terms: -21 + 56 = 35
-35a = 35

Divide each side by '-35'.
a = -1

Simplifying
a = -1

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