5(2a-21)=a+21

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Solution for 5(2a-21)=a+21 equation:


Simplifying
5(2a + -21) = a + 21

Reorder the terms:
5(-21 + 2a) = a + 21
(-21 * 5 + 2a * 5) = a + 21
(-105 + 10a) = a + 21

Reorder the terms:
-105 + 10a = 21 + a

Solving
-105 + 10a = 21 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-105 + 10a + -1a = 21 + a + -1a

Combine like terms: 10a + -1a = 9a
-105 + 9a = 21 + a + -1a

Combine like terms: a + -1a = 0
-105 + 9a = 21 + 0
-105 + 9a = 21

Add '105' to each side of the equation.
-105 + 105 + 9a = 21 + 105

Combine like terms: -105 + 105 = 0
0 + 9a = 21 + 105
9a = 21 + 105

Combine like terms: 21 + 105 = 126
9a = 126

Divide each side by '9'.
a = 14

Simplifying
a = 14

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