9x+4=9x+25-7a

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Solution for 9x+4=9x+25-7a equation:


Simplifying
9x + 4 = 9x + 25 + -7a

Reorder the terms:
4 + 9x = 9x + 25 + -7a

Reorder the terms:
4 + 9x = 25 + -7a + 9x

Add '-9x' to each side of the equation.
4 + 9x + -9x = 25 + -7a + 9x + -9x

Combine like terms: 9x + -9x = 0
4 + 0 = 25 + -7a + 9x + -9x
4 = 25 + -7a + 9x + -9x

Combine like terms: 9x + -9x = 0
4 = 25 + -7a + 0
4 = 25 + -7a

Solving
4 = 25 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
4 + 7a = 25 + -7a + 7a

Combine like terms: -7a + 7a = 0
4 + 7a = 25 + 0
4 + 7a = 25

Add '-4' to each side of the equation.
4 + -4 + 7a = 25 + -4

Combine like terms: 4 + -4 = 0
0 + 7a = 25 + -4
7a = 25 + -4

Combine like terms: 25 + -4 = 21
7a = 21

Divide each side by '7'.
a = 3

Simplifying
a = 3

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