25-5a=4(1-2a)

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Solution for 25-5a=4(1-2a) equation:


Simplifying
25 + -5a = 4(1 + -2a)
25 + -5a = (1 * 4 + -2a * 4)
25 + -5a = (4 + -8a)

Solving
25 + -5a = 4 + -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.
25 + -5a + 8a = 4 + -8a + 8a

Combine like terms: -5a + 8a = 3a
25 + 3a = 4 + -8a + 8a

Combine like terms: -8a + 8a = 0
25 + 3a = 4 + 0
25 + 3a = 4

Add '-25' to each side of the equation.
25 + -25 + 3a = 4 + -25

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

Combine like terms: 4 + -25 = -21
3a = -21

Divide each side by '3'.
a = -7

Simplifying
a = -7

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