4*21=7x

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Solution for 4*21=7x equation:


Simplifying
4 * 21 = 7x

Multiply 4 * 21
84 = 7x

Solving
84 = 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
84 + -7x = 7x + -7x

Combine like terms: 7x + -7x = 0
84 + -7x = 0

Add '-84' to each side of the equation.
84 + -84 + -7x = 0 + -84

Combine like terms: 84 + -84 = 0
0 + -7x = 0 + -84
-7x = 0 + -84

Combine like terms: 0 + -84 = -84
-7x = -84

Divide each side by '-7'.
x = 12

Simplifying
x = 12

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