34a-4(5a+7)=-21

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Solution for 34a-4(5a+7)=-21 equation:


Simplifying
34a + -4(5a + 7) = -21

Reorder the terms:
34a + -4(7 + 5a) = -21
34a + (7 * -4 + 5a * -4) = -21
34a + (-28 + -20a) = -21

Reorder the terms:
-28 + 34a + -20a = -21

Combine like terms: 34a + -20a = 14a
-28 + 14a = -21

Solving
-28 + 14a = -21

Solving for variable 'a'.

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

Add '28' to each side of the equation.
-28 + 28 + 14a = -21 + 28

Combine like terms: -28 + 28 = 0
0 + 14a = -21 + 28
14a = -21 + 28

Combine like terms: -21 + 28 = 7
14a = 7

Divide each side by '14'.
a = 0.5

Simplifying
a = 0.5

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