3(x+2)+(x+1)=18

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Solution for 3(x+2)+(x+1)=18 equation:


Simplifying
3(x + 2) + (x + 1) = 18

Reorder the terms:
3(2 + x) + (x + 1) = 18
(2 * 3 + x * 3) + (x + 1) = 18
(6 + 3x) + (x + 1) = 18

Reorder the terms:
6 + 3x + (1 + x) = 18

Remove parenthesis around (1 + x)
6 + 3x + 1 + x = 18

Reorder the terms:
6 + 1 + 3x + x = 18

Combine like terms: 6 + 1 = 7
7 + 3x + x = 18

Combine like terms: 3x + x = 4x
7 + 4x = 18

Solving
7 + 4x = 18

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + 4x = 18 + -7

Combine like terms: 7 + -7 = 0
0 + 4x = 18 + -7
4x = 18 + -7

Combine like terms: 18 + -7 = 11
4x = 11

Divide each side by '4'.
x = 2.75

Simplifying
x = 2.75

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