3.9x-1.8+x-4.2=

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Solution for 3.9x-1.8+x-4.2= equation:


Simplifying
3.9x + -1.8 + x + -4.2 = 0

Reorder the terms:
-1.8 + -4.2 + 3.9x + x = 0

Combine like terms: -1.8 + -4.2 = -6
-6 + 3.9x + x = 0

Combine like terms: 3.9x + x = 4.9x
-6 + 4.9x = 0

Solving
-6 + 4.9x = 0

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + 4.9x = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 4.9x = 0 + 6
4.9x = 0 + 6

Combine like terms: 0 + 6 = 6
4.9x = 6

Divide each side by '4.9'.
x = 1.224489796

Simplifying
x = 1.224489796

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