25=18-7a

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Solution for 25=18-7a equation:


Simplifying
25 = 18 + -7a

Solving
25 = 18 + -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 + 7a = 18 + -7a + 7a

Combine like terms: -7a + 7a = 0
25 + 7a = 18 + 0
25 + 7a = 18

Add '-25' to each side of the equation.
25 + -25 + 7a = 18 + -25

Combine like terms: 25 + -25 = 0
0 + 7a = 18 + -25
7a = 18 + -25

Combine like terms: 18 + -25 = -7
7a = -7

Divide each side by '7'.
a = -1

Simplifying
a = -1

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