6a-7=-8a+21

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Solution for 6a-7=-8a+21 equation:


Simplifying
6a + -7 = -8a + 21

Reorder the terms:
-7 + 6a = -8a + 21

Reorder the terms:
-7 + 6a = 21 + -8a

Solving
-7 + 6a = 21 + -8a

Solving for variable 'a'.

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

Add '8a' to each side of the equation.
-7 + 6a + 8a = 21 + -8a + 8a

Combine like terms: 6a + 8a = 14a
-7 + 14a = 21 + -8a + 8a

Combine like terms: -8a + 8a = 0
-7 + 14a = 21 + 0
-7 + 14a = 21

Add '7' to each side of the equation.
-7 + 7 + 14a = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 14a = 21 + 7
14a = 21 + 7

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

Divide each side by '14'.
a = 2

Simplifying
a = 2

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