(25x-9x-4)-(9x+7)=4x+20

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Solution for (25x-9x-4)-(9x+7)=4x+20 equation:


Simplifying
(25x + -9x + -4) + -1(9x + 7) = 4x + 20

Reorder the terms:
(-4 + 25x + -9x) + -1(9x + 7) = 4x + 20

Combine like terms: 25x + -9x = 16x
(-4 + 16x) + -1(9x + 7) = 4x + 20

Remove parenthesis around (-4 + 16x)
-4 + 16x + -1(9x + 7) = 4x + 20

Reorder the terms:
-4 + 16x + -1(7 + 9x) = 4x + 20
-4 + 16x + (7 * -1 + 9x * -1) = 4x + 20
-4 + 16x + (-7 + -9x) = 4x + 20

Reorder the terms:
-4 + -7 + 16x + -9x = 4x + 20

Combine like terms: -4 + -7 = -11
-11 + 16x + -9x = 4x + 20

Combine like terms: 16x + -9x = 7x
-11 + 7x = 4x + 20

Reorder the terms:
-11 + 7x = 20 + 4x

Solving
-11 + 7x = 20 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-11 + 7x + -4x = 20 + 4x + -4x

Combine like terms: 7x + -4x = 3x
-11 + 3x = 20 + 4x + -4x

Combine like terms: 4x + -4x = 0
-11 + 3x = 20 + 0
-11 + 3x = 20

Add '11' to each side of the equation.
-11 + 11 + 3x = 20 + 11

Combine like terms: -11 + 11 = 0
0 + 3x = 20 + 11
3x = 20 + 11

Combine like terms: 20 + 11 = 31
3x = 31

Divide each side by '3'.
x = 10.33333333

Simplifying
x = 10.33333333

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