-2.87+4.2=x

Solution for -2.87+4.2=x equation:

Simplifying
-2.87 + 4.2 = x

Combine like terms: -2.87 + 4.2 = 1.33
1.33 = x

Solving
1.33 = 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.
1.33 + -1x = x + -1x

Combine like terms: x + -1x = 0
1.33 + -1x = 0

Add '-1.33' to each side of the equation.
1.33 + -1.33 + -1x = 0 + -1.33

Combine like terms: 1.33 + -1.33 = 0.00
0.00 + -1x = 0 + -1.33
-1x = 0 + -1.33

Combine like terms: 0 + -1.33 = -1.33
-1x = -1.33

Divide each side by '-1'.
x = 1.33

Simplifying
x = 1.33