7(x+3)+3x=81

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Solution for 7(x+3)+3x=81 equation:


Simplifying
7(x + 3) + 3x = 81

Reorder the terms:
7(3 + x) + 3x = 81
(3 * 7 + x * 7) + 3x = 81
(21 + 7x) + 3x = 81

Combine like terms: 7x + 3x = 10x
21 + 10x = 81

Solving
21 + 10x = 81

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 10x = 81 + -21

Combine like terms: 21 + -21 = 0
0 + 10x = 81 + -21
10x = 81 + -21

Combine like terms: 81 + -21 = 60
10x = 60

Divide each side by '10'.
x = 6

Simplifying
x = 6

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