-51=3(-2-5a)

Solution for -51=3(-2-5a) equation:

Simplifying
-51 = 3(-2 + -5a)
-51 = (-2 * 3 + -5a * 3)
-51 = (-6 + -15a)

Solving
-51 = -6 + -15a

Solving for variable 'a'.

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

Add '15a' to each side of the equation.
-51 + 15a = -6 + -15a + 15a

Combine like terms: -15a + 15a = 0
-51 + 15a = -6 + 0
-51 + 15a = -6

Add '51' to each side of the equation.
-51 + 51 + 15a = -6 + 51

Combine like terms: -51 + 51 = 0
0 + 15a = -6 + 51
15a = -6 + 51

Combine like terms: -6 + 51 = 45
15a = 45

Divide each side by '15'.
a = 3

Simplifying
a = 3