3x+4(x-9)=20-4(3+x)

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Solution for 3x+4(x-9)=20-4(3+x) equation:


Simplifying
3x + 4(x + -9) = 20 + -4(3 + x)

Reorder the terms:
3x + 4(-9 + x) = 20 + -4(3 + x)
3x + (-9 * 4 + x * 4) = 20 + -4(3 + x)
3x + (-36 + 4x) = 20 + -4(3 + x)

Reorder the terms:
-36 + 3x + 4x = 20 + -4(3 + x)

Combine like terms: 3x + 4x = 7x
-36 + 7x = 20 + -4(3 + x)
-36 + 7x = 20 + (3 * -4 + x * -4)
-36 + 7x = 20 + (-12 + -4x)

Combine like terms: 20 + -12 = 8
-36 + 7x = 8 + -4x

Solving
-36 + 7x = 8 + -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.
-36 + 7x + 4x = 8 + -4x + 4x

Combine like terms: 7x + 4x = 11x
-36 + 11x = 8 + -4x + 4x

Combine like terms: -4x + 4x = 0
-36 + 11x = 8 + 0
-36 + 11x = 8

Add '36' to each side of the equation.
-36 + 36 + 11x = 8 + 36

Combine like terms: -36 + 36 = 0
0 + 11x = 8 + 36
11x = 8 + 36

Combine like terms: 8 + 36 = 44
11x = 44

Divide each side by '11'.
x = 4

Simplifying
x = 4

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