28=3a-4(28-s)

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Solution for 28=3a-4(28-s) equation:


Simplifying
28 = 3a + -4(28 + -1s)
28 = 3a + (28 * -4 + -1s * -4)
28 = 3a + (-112 + 4s)

Reorder the terms:
28 = -112 + 3a + 4s

Solving
28 = -112 + 3a + 4s

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
28 + -3a = -112 + 3a + -3a + 4s

Combine like terms: 3a + -3a = 0
28 + -3a = -112 + 0 + 4s
28 + -3a = -112 + 4s

Add '-28' to each side of the equation.
28 + -28 + -3a = -112 + -28 + 4s

Combine like terms: 28 + -28 = 0
0 + -3a = -112 + -28 + 4s
-3a = -112 + -28 + 4s

Combine like terms: -112 + -28 = -140
-3a = -140 + 4s

Divide each side by '-3'.
a = 46.66666667 + -1.333333333s

Simplifying
a = 46.66666667 + -1.333333333s

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