15*7=x

Solution for 15*7=x equation:

Simplifying
15 * 7 = x

Multiply 15 * 7
105 = x

Solving
105 = 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.
105 + -1x = x + -1x

Combine like terms: x + -1x = 0
105 + -1x = 0

Add '-105' to each side of the equation.
105 + -105 + -1x = 0 + -105

Combine like terms: 105 + -105 = 0
0 + -1x = 0 + -105
-1x = 0 + -105

Combine like terms: 0 + -105 = -105
-1x = -105

Divide each side by '-1'.
x = 105

Simplifying
x = 105