3.5x+13=-8

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Solution for 3.5x+13=-8 equation: 


Simplifying
3.5x + 13 = -8

Reorder the terms:
13 + 3.5x = -8

Solving
13 + 3.5x = -8

Solving for variable 'x'.

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

Add '-13' to each side of the equation.
13 + -13 + 3.5x = -8 + -13

Combine like terms: 13 + -13 = 0
0 + 3.5x = -8 + -13
3.5x = -8 + -13

Combine like terms: -8 + -13 = -21
3.5x = -21

Divide each side by '3.5'.
x = -6

Simplifying
x = -6

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