-5*18=c

Solution for -5*18=c equation:

Simplifying
-5 * 18 = c

Multiply -5 * 18
-90 = c

Solving
-90 = c

Solving for variable 'c'.

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

Add '-1c' to each side of the equation.
-90 + -1c = c + -1c

Combine like terms: c + -1c = 0
-90 + -1c = 0

Add '90' to each side of the equation.
-90 + 90 + -1c = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -1c = 0 + 90
-1c = 0 + 90

Combine like terms: 0 + 90 = 90
-1c = 90

Divide each side by '-1'.
c = -90

Simplifying
c = -90