2.6+7.8=3+x

Solution for 2.6+7.8=3+x equation:

Simplifying
2.6 + 7.8 = 3 + x

Combine like terms: 2.6 + 7.8 = 10.4
10.4 = 3 + x

Solving
10.4 = 3 + 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.
10.4 + -1x = 3 + x + -1x

Combine like terms: x + -1x = 0
10.4 + -1x = 3 + 0
10.4 + -1x = 3

Add '-10.4' to each side of the equation.
10.4 + -10.4 + -1x = 3 + -10.4

Combine like terms: 10.4 + -10.4 = 0.0
0.0 + -1x = 3 + -10.4
-1x = 3 + -10.4

Combine like terms: 3 + -10.4 = -7.4
-1x = -7.4

Divide each side by '-1'.
x = 7.4

Simplifying
x = 7.4