=8+x+3x+7

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Solution for =8+x+3x+7 equation:


Simplifying
0 = 8 + x + 3x + 7

Reorder the terms:
0 = 8 + 7 + x + 3x

Combine like terms: 8 + 7 = 15
0 = 15 + x + 3x

Combine like terms: x + 3x = 4x
0 = 15 + 4x

Solving
0 = 15 + 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.
0 + -4x = 15 + 4x + -4x
Remove the zero:
-4x = 15 + 4x + -4x

Combine like terms: 4x + -4x = 0
-4x = 15 + 0
-4x = 15

Divide each side by '-4'.
x = -3.75

Simplifying
x = -3.75

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