2.1x+6.45=-4.05

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Solution for 2.1x+6.45=-4.05 equation: 


Simplifying
2.1x + 6.45 = -4.05

Reorder the terms:
6.45 + 2.1x = -4.05

Solving
6.45 + 2.1x = -4.05

Solving for variable 'x'.

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

Add '-6.45' to each side of the equation.
6.45 + -6.45 + 2.1x = -4.05 + -6.45

Combine like terms: 6.45 + -6.45 = 0.00
0.00 + 2.1x = -4.05 + -6.45
2.1x = -4.05 + -6.45

Combine like terms: -4.05 + -6.45 = -10.5
2.1x = -10.5

Divide each side by '2.1'.
x = -5

Simplifying
x = -5

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