(987654321123456789)(123)=X

Solution for (987654321123456789)(123)=X equation:

Simplifying
(987654321123456789)(123) = X

Multiply 987654321123456789 * 123
121481481500000000000 = X

Solving
121481481500000000000 = 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.
121481481500000000000 + -1X = X + -1X

Combine like terms: X + -1X = 0
121481481500000000000 + -1X = 0

Add '-121481481500000000000' to each side of the equation.
121481481500000000000 + -121481481500000000000 + -1X = 0 + -121481481500000000000

Combine like terms: 121481481500000000000 + -121481481500000000000 = 0
0 + -1X = 0 + -121481481500000000000
-1X = 0 + -121481481500000000000

Combine like terms: 0 + -121481481500000000000 = -121481481500000000000
-1X = -121481481500000000000

Divide each side by '-1'.
X = 121481481500000000000

Simplifying
X = 121481481500000000000