-400*2.5=x

Solution for -400*2.5=x equation:

Simplifying
-400 * 2.5 = x

Multiply -400 * 2.5
-1000 = x

Solving
-1000 = 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.
-1000 + -1x = x + -1x

Combine like terms: x + -1x = 0
-1000 + -1x = 0

Add '1000' to each side of the equation.
-1000 + 1000 + -1x = 0 + 1000

Combine like terms: -1000 + 1000 = 0
0 + -1x = 0 + 1000
-1x = 0 + 1000

Combine like terms: 0 + 1000 = 1000
-1x = 1000

Divide each side by '-1'.
x = -1000

Simplifying
x = -1000