7x+4(x-10)=81

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Solution for 7x+4(x-10)=81 equation:


Simplifying
7x + 4(x + -10) = 81

Reorder the terms:
7x + 4(-10 + x) = 81
7x + (-10 * 4 + x * 4) = 81
7x + (-40 + 4x) = 81

Reorder the terms:
-40 + 7x + 4x = 81

Combine like terms: 7x + 4x = 11x
-40 + 11x = 81

Solving
-40 + 11x = 81

Solving for variable 'x'.

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

Add '40' to each side of the equation.
-40 + 40 + 11x = 81 + 40

Combine like terms: -40 + 40 = 0
0 + 11x = 81 + 40
11x = 81 + 40

Combine like terms: 81 + 40 = 121
11x = 121

Divide each side by '11'.
x = 11

Simplifying
x = 11

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