3-3a=5-2(2a+7)

Solution for 3-3a=5-2(2a+7) equation:

Simplifying
3 + -3a = 5 + -2(2a + 7)

Reorder the terms:
3 + -3a = 5 + -2(7 + 2a)
3 + -3a = 5 + (7 * -2 + 2a * -2)
3 + -3a = 5 + (-14 + -4a)

Combine like terms: 5 + -14 = -9
3 + -3a = -9 + -4a

Solving
3 + -3a = -9 + -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.
3 + -3a + 4a = -9 + -4a + 4a

Combine like terms: -3a + 4a = 1a
3 + 1a = -9 + -4a + 4a

Combine like terms: -4a + 4a = 0
3 + 1a = -9 + 0
3 + 1a = -9

Add '-3' to each side of the equation.
3 + -3 + 1a = -9 + -3

Combine like terms: 3 + -3 = 0
0 + 1a = -9 + -3
1a = -9 + -3

Combine like terms: -9 + -3 = -12
1a = -12

Divide each side by '1'.
a = -12

Simplifying
a = -12