15x+40=-x

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Solution for 15x+40=-x equation:


Simplifying
15x + 40 = -1x

Reorder the terms:
40 + 15x = -1x

Solving
40 + 15x = -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
40 + 15x + x = -1x + x

Combine like terms: 15x + x = 16x
40 + 16x = -1x + x

Combine like terms: -1x + x = 0
40 + 16x = 0

Add '-40' to each side of the equation.
40 + -40 + 16x = 0 + -40

Combine like terms: 40 + -40 = 0
0 + 16x = 0 + -40
16x = 0 + -40

Combine like terms: 0 + -40 = -40
16x = -40

Divide each side by '16'.
x = -2.5

Simplifying
x = -2.5

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