7-2.8=x

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Solution for 7-2.8=x equation:


Simplifying
7 + -2.8 = x

Combine like terms: 7 + -2.8 = 4.2
4.2 = x

Solving
4.2 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
4.2 + -1x = x + -1x

Combine like terms: x + -1x = 0
4.2 + -1x = 0

Add '-4.2' to each side of the equation.
4.2 + -4.2 + -1x = 0 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + -1x = 0 + -4.2
-1x = 0 + -4.2

Combine like terms: 0 + -4.2 = -4.2
-1x = -4.2

Divide each side by '-1'.
x = 4.2

Simplifying
x = 4.2

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