(39-x)*(39-x)=(33-x)*(39-x)

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Solution for (39-x)*(39-x)=(33-x)*(39-x) equation:


Simplifying
(39 + -1x)(39 + -1x) = (33 + -1x)(39 + -1x)

Multiply (39 + -1x) * (39 + -1x)
(39(39 + -1x) + -1x * (39 + -1x)) = (33 + -1x)(39 + -1x)
((39 * 39 + -1x * 39) + -1x * (39 + -1x)) = (33 + -1x)(39 + -1x)
((1521 + -39x) + -1x * (39 + -1x)) = (33 + -1x)(39 + -1x)
(1521 + -39x + (39 * -1x + -1x * -1x)) = (33 + -1x)(39 + -1x)
(1521 + -39x + (-39x + 1x2)) = (33 + -1x)(39 + -1x)

Combine like terms: -39x + -39x = -78x
(1521 + -78x + 1x2) = (33 + -1x)(39 + -1x)

Multiply (33 + -1x) * (39 + -1x)
1521 + -78x + 1x2 = (33(39 + -1x) + -1x * (39 + -1x))
1521 + -78x + 1x2 = ((39 * 33 + -1x * 33) + -1x * (39 + -1x))
1521 + -78x + 1x2 = ((1287 + -33x) + -1x * (39 + -1x))
1521 + -78x + 1x2 = (1287 + -33x + (39 * -1x + -1x * -1x))
1521 + -78x + 1x2 = (1287 + -33x + (-39x + 1x2))

Combine like terms: -33x + -39x = -72x
1521 + -78x + 1x2 = (1287 + -72x + 1x2)

Add '-1x2' to each side of the equation.
1521 + -78x + 1x2 + -1x2 = 1287 + -72x + 1x2 + -1x2

Combine like terms: 1x2 + -1x2 = 0
1521 + -78x + 0 = 1287 + -72x + 1x2 + -1x2
1521 + -78x = 1287 + -72x + 1x2 + -1x2

Combine like terms: 1x2 + -1x2 = 0
1521 + -78x = 1287 + -72x + 0
1521 + -78x = 1287 + -72x

Solving
1521 + -78x = 1287 + -72x

Solving for variable 'x'.

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

Add '72x' to each side of the equation.
1521 + -78x + 72x = 1287 + -72x + 72x

Combine like terms: -78x + 72x = -6x
1521 + -6x = 1287 + -72x + 72x

Combine like terms: -72x + 72x = 0
1521 + -6x = 1287 + 0
1521 + -6x = 1287

Add '-1521' to each side of the equation.
1521 + -1521 + -6x = 1287 + -1521

Combine like terms: 1521 + -1521 = 0
0 + -6x = 1287 + -1521
-6x = 1287 + -1521

Combine like terms: 1287 + -1521 = -234
-6x = -234

Divide each side by '-6'.
x = 39

Simplifying
x = 39

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