x+3(x+3)=20

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Solution for x+3(x+3)=20 equation:


Simplifying
x + 3(x + 3) = 20

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

Reorder the terms:
9 + x + 3x = 20

Combine like terms: x + 3x = 4x
9 + 4x = 20

Solving
9 + 4x = 20

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 4x = 20 + -9

Combine like terms: 9 + -9 = 0
0 + 4x = 20 + -9
4x = 20 + -9

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

Divide each side by '4'.
x = 2.75

Simplifying
x = 2.75

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