21(5*7)=x

Solution for 21(5*7)=x equation:

Simplifying
21(5 * 7) = x

Multiply 5 * 7
21(35) = x

Multiply 21 * 35
735 = x

Solving
735 = 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.
735 + -1x = x + -1x

Combine like terms: x + -1x = 0
735 + -1x = 0

Add '-735' to each side of the equation.
735 + -735 + -1x = 0 + -735

Combine like terms: 735 + -735 = 0
0 + -1x = 0 + -735
-1x = 0 + -735

Combine like terms: 0 + -735 = -735
-1x = -735

Divide each side by '-1'.
x = 735

Simplifying
x = 735