2x+8.7=x-21.4

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Solution for 2x+8.7=x-21.4 equation:


Simplifying
2x + 8.7 = x + -21.4

Reorder the terms:
8.7 + 2x = x + -21.4

Reorder the terms:
8.7 + 2x = -21.4 + x

Solving
8.7 + 2x = -21.4 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
8.7 + 2x + -1x = -21.4 + x + -1x

Combine like terms: 2x + -1x = 1x
8.7 + 1x = -21.4 + x + -1x

Combine like terms: x + -1x = 0
8.7 + 1x = -21.4 + 0
8.7 + 1x = -21.4

Add '-8.7' to each side of the equation.
8.7 + -8.7 + 1x = -21.4 + -8.7

Combine like terms: 8.7 + -8.7 = 0.0
0.0 + 1x = -21.4 + -8.7
1x = -21.4 + -8.7

Combine like terms: -21.4 + -8.7 = -30.1
1x = -30.1

Divide each side by '1'.
x = -30.1

Simplifying
x = -30.1

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