57=3(4a-7)-6(-7a-4)

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Solution for 57=3(4a-7)-6(-7a-4) equation:


Simplifying
57 = 3(4a + -7) + -6(-7a + -4)

Reorder the terms:
57 = 3(-7 + 4a) + -6(-7a + -4)
57 = (-7 * 3 + 4a * 3) + -6(-7a + -4)
57 = (-21 + 12a) + -6(-7a + -4)

Reorder the terms:
57 = -21 + 12a + -6(-4 + -7a)
57 = -21 + 12a + (-4 * -6 + -7a * -6)
57 = -21 + 12a + (24 + 42a)

Reorder the terms:
57 = -21 + 24 + 12a + 42a

Combine like terms: -21 + 24 = 3
57 = 3 + 12a + 42a

Combine like terms: 12a + 42a = 54a
57 = 3 + 54a

Solving
57 = 3 + 54a

Solving for variable 'a'.

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

Add '-54a' to each side of the equation.
57 + -54a = 3 + 54a + -54a

Combine like terms: 54a + -54a = 0
57 + -54a = 3 + 0
57 + -54a = 3

Add '-57' to each side of the equation.
57 + -57 + -54a = 3 + -57

Combine like terms: 57 + -57 = 0
0 + -54a = 3 + -57
-54a = 3 + -57

Combine like terms: 3 + -57 = -54
-54a = -54

Divide each side by '-54'.
a = 1

Simplifying
a = 1

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