66=3-7a

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Solution for 66=3-7a equation:


Simplifying
66 = 3 + -7a

Solving
66 = 3 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
66 + 7a = 3 + -7a + 7a

Combine like terms: -7a + 7a = 0
66 + 7a = 3 + 0
66 + 7a = 3

Add '-66' to each side of the equation.
66 + -66 + 7a = 3 + -66

Combine like terms: 66 + -66 = 0
0 + 7a = 3 + -66
7a = 3 + -66

Combine like terms: 3 + -66 = -63
7a = -63

Divide each side by '7'.
a = -9

Simplifying
a = -9

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