25-7a=28-4a

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Solution for 25-7a=28-4a equation:


Simplifying
25 + -7a = 28 + -4a

Solving
25 + -7a = 28 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
25 + -7a + 4a = 28 + -4a + 4a

Combine like terms: -7a + 4a = -3a
25 + -3a = 28 + -4a + 4a

Combine like terms: -4a + 4a = 0
25 + -3a = 28 + 0
25 + -3a = 28

Add '-25' to each side of the equation.
25 + -25 + -3a = 28 + -25

Combine like terms: 25 + -25 = 0
0 + -3a = 28 + -25
-3a = 28 + -25

Combine like terms: 28 + -25 = 3
-3a = 3

Divide each side by '-3'.
a = -1

Simplifying
a = -1

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