81=5+4(5+2x)

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Solution for 81=5+4(5+2x) equation:


Simplifying
81 = 5 + 4(5 + 2x)
81 = 5 + (5 * 4 + 2x * 4)
81 = 5 + (20 + 8x)

Combine like terms: 5 + 20 = 25
81 = 25 + 8x

Solving
81 = 25 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
81 + -8x = 25 + 8x + -8x

Combine like terms: 8x + -8x = 0
81 + -8x = 25 + 0
81 + -8x = 25

Add '-81' to each side of the equation.
81 + -81 + -8x = 25 + -81

Combine like terms: 81 + -81 = 0
0 + -8x = 25 + -81
-8x = 25 + -81

Combine like terms: 25 + -81 = -56
-8x = -56

Divide each side by '-8'.
x = 7

Simplifying
x = 7

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