64=7(a+4)-3a

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Solution for 64=7(a+4)-3a equation:


Simplifying
64 = 7(a + 4) + -3a

Reorder the terms:
64 = 7(4 + a) + -3a
64 = (4 * 7 + a * 7) + -3a
64 = (28 + 7a) + -3a

Combine like terms: 7a + -3a = 4a
64 = 28 + 4a

Solving
64 = 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.
64 + -4a = 28 + 4a + -4a

Combine like terms: 4a + -4a = 0
64 + -4a = 28 + 0
64 + -4a = 28

Add '-64' to each side of the equation.
64 + -64 + -4a = 28 + -64

Combine like terms: 64 + -64 = 0
0 + -4a = 28 + -64
-4a = 28 + -64

Combine like terms: 28 + -64 = -36
-4a = -36

Divide each side by '-4'.
a = 9

Simplifying
a = 9

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