x+1+3x+2+15=7

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Solution for x+1+3x+2+15=7 equation:


Simplifying
x + 1 + 3x + 2 + 15 = 7

Reorder the terms:
1 + 2 + 15 + x + 3x = 7

Combine like terms: 1 + 2 = 3
3 + 15 + x + 3x = 7

Combine like terms: 3 + 15 = 18
18 + x + 3x = 7

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

Solving
18 + 4x = 7

Solving for variable 'x'.

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

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

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

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

Divide each side by '4'.
x = -2.75

Simplifying
x = -2.75

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