5(a+3)-7=6a-21

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Solution for 5(a+3)-7=6a-21 equation:


Simplifying
5(a + 3) + -7 = 6a + -21

Reorder the terms:
5(3 + a) + -7 = 6a + -21
(3 * 5 + a * 5) + -7 = 6a + -21
(15 + 5a) + -7 = 6a + -21

Reorder the terms:
15 + -7 + 5a = 6a + -21

Combine like terms: 15 + -7 = 8
8 + 5a = 6a + -21

Reorder the terms:
8 + 5a = -21 + 6a

Solving
8 + 5a = -21 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
8 + 5a + -6a = -21 + 6a + -6a

Combine like terms: 5a + -6a = -1a
8 + -1a = -21 + 6a + -6a

Combine like terms: 6a + -6a = 0
8 + -1a = -21 + 0
8 + -1a = -21

Add '-8' to each side of the equation.
8 + -8 + -1a = -21 + -8

Combine like terms: 8 + -8 = 0
0 + -1a = -21 + -8
-1a = -21 + -8

Combine like terms: -21 + -8 = -29
-1a = -29

Divide each side by '-1'.
a = 29

Simplifying
a = 29

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