19x-4(4x-9)=81

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Solution for 19x-4(4x-9)=81 equation:


Simplifying
19x + -4(4x + -9) = 81

Reorder the terms:
19x + -4(-9 + 4x) = 81
19x + (-9 * -4 + 4x * -4) = 81
19x + (36 + -16x) = 81

Reorder the terms:
36 + 19x + -16x = 81

Combine like terms: 19x + -16x = 3x
36 + 3x = 81

Solving
36 + 3x = 81

Solving for variable 'x'.

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

Add '-36' to each side of the equation.
36 + -36 + 3x = 81 + -36

Combine like terms: 36 + -36 = 0
0 + 3x = 81 + -36
3x = 81 + -36

Combine like terms: 81 + -36 = 45
3x = 45

Divide each side by '3'.
x = 15

Simplifying
x = 15

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