-51=-7(-1+4a)+5(1-7a)

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Solution for -51=-7(-1+4a)+5(1-7a) equation:


Simplifying
-51 = -7(-1 + 4a) + 5(1 + -7a)
-51 = (-1 * -7 + 4a * -7) + 5(1 + -7a)
-51 = (7 + -28a) + 5(1 + -7a)
-51 = 7 + -28a + (1 * 5 + -7a * 5)
-51 = 7 + -28a + (5 + -35a)

Reorder the terms:
-51 = 7 + 5 + -28a + -35a

Combine like terms: 7 + 5 = 12
-51 = 12 + -28a + -35a

Combine like terms: -28a + -35a = -63a
-51 = 12 + -63a

Solving
-51 = 12 + -63a

Solving for variable 'a'.

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

Add '63a' to each side of the equation.
-51 + 63a = 12 + -63a + 63a

Combine like terms: -63a + 63a = 0
-51 + 63a = 12 + 0
-51 + 63a = 12

Add '51' to each side of the equation.
-51 + 51 + 63a = 12 + 51

Combine like terms: -51 + 51 = 0
0 + 63a = 12 + 51
63a = 12 + 51

Combine like terms: 12 + 51 = 63
63a = 63

Divide each side by '63'.
a = 1

Simplifying
a = 1

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