15*7=21*5

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Solution for 15*7=21*5 equation: 


Simplifying
15 * 7 = 21 * 5

Multiply 15 * 7
105 = 21 * 5

Multiply 21 * 5
105 = 105

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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