3.9x-9.87=6.9

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Solution for 3.9x-9.87=6.9 equation:


Simplifying
3.9x + -9.87 = 6.9

Reorder the terms:
-9.87 + 3.9x = 6.9

Solving
-9.87 + 3.9x = 6.9

Solving for variable 'x'.

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

Add '9.87' to each side of the equation.
-9.87 + 9.87 + 3.9x = 6.9 + 9.87

Combine like terms: -9.87 + 9.87 = 0.00
0.00 + 3.9x = 6.9 + 9.87
3.9x = 6.9 + 9.87

Combine like terms: 6.9 + 9.87 = 16.77
3.9x = 16.77

Divide each side by '3.9'.
x = 4.3

Simplifying
x = 4.3

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