4=21

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Solution for 4=21 equation:


4=21

We simplify the equation to the form, which is simple to understand
4=21

We move all terms containing to the left and all other terms to the right.
0=+21-4

We simplify left and right side of the equation.
0=+17

0=17

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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