9a+25=7a-15

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Solution for 9a+25=7a-15 equation:


Simplifying
9a + 25 = 7a + -15

Reorder the terms:
25 + 9a = 7a + -15

Reorder the terms:
25 + 9a = -15 + 7a

Solving
25 + 9a = -15 + 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.
25 + 9a + -7a = -15 + 7a + -7a

Combine like terms: 9a + -7a = 2a
25 + 2a = -15 + 7a + -7a

Combine like terms: 7a + -7a = 0
25 + 2a = -15 + 0
25 + 2a = -15

Add '-25' to each side of the equation.
25 + -25 + 2a = -15 + -25

Combine like terms: 25 + -25 = 0
0 + 2a = -15 + -25
2a = -15 + -25

Combine like terms: -15 + -25 = -40
2a = -40

Divide each side by '2'.
a = -20

Simplifying
a = -20

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