2.90=x+2x+(x+8)

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Solution for 2.90=x+2x+(x+8) equation: 


Simplifying
2.90 = x + 2x + (x + 8)

Reorder the terms:
2.90 = x + 2x + (8 + x)

Remove parenthesis around (8 + x)
2.90 = x + 2x + 8 + x

Reorder the terms:
2.90 = 8 + x + 2x + x

Combine like terms: x + 2x = 3x
2.90 = 8 + 3x + x

Combine like terms: 3x + x = 4x
2.90 = 8 + 4x

Solving
2.90 = 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.
2.90 + -4x = 8 + 4x + -4x

Combine like terms: 4x + -4x = 0
2.90 + -4x = 8 + 0
2.90 + -4x = 8

Add '-2.90' to each side of the equation.
2.90 + -2.90 + -4x = 8 + -2.90

Combine like terms: 2.90 + -2.90 = 0.00
0.00 + -4x = 8 + -2.90
-4x = 8 + -2.90

Combine like terms: 8 + -2.90 = 5.1
-4x = 5.1

Divide each side by '-4'.
x = -1.275

Simplifying
x = -1.275

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