3x(a+7)=51

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Solution for 3x(a+7)=51 equation:


Simplifying
3x(a + 7) = 51

Reorder the terms:
3x(7 + a) = 51
(7 * 3x + a * 3x) = 51

Reorder the terms:
(3ax + 21x) = 51
(3ax + 21x) = 51

Solving
3ax + 21x = 51

Solving for variable 'a'.

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

Add '-21x' to each side of the equation.
3ax + 21x + -21x = 51 + -21x

Combine like terms: 21x + -21x = 0
3ax + 0 = 51 + -21x
3ax = 51 + -21x

Divide each side by '3x'.
a = 17x-1 + -7

Simplifying
a = 17x-1 + -7

Reorder the terms:
a = -7 + 17x-1

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