7x+2(7x-12)=81

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Solution for 7x+2(7x-12)=81 equation:


Simplifying
7x + 2(7x + -12) = 81

Reorder the terms:
7x + 2(-12 + 7x) = 81
7x + (-12 * 2 + 7x * 2) = 81
7x + (-24 + 14x) = 81

Reorder the terms:
-24 + 7x + 14x = 81

Combine like terms: 7x + 14x = 21x
-24 + 21x = 81

Solving
-24 + 21x = 81

Solving for variable 'x'.

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

Add '24' to each side of the equation.
-24 + 24 + 21x = 81 + 24

Combine like terms: -24 + 24 = 0
0 + 21x = 81 + 24
21x = 81 + 24

Combine like terms: 81 + 24 = 105
21x = 105

Divide each side by '21'.
x = 5

Simplifying
x = 5

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