2.1=0.7*3

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Solution for 2.1=0.7*3 equation: 


Simplifying
2.1 = 0.7 * 3

Multiply 0.7 * 3
2.1 = 2.1

Add '-2.1' to each side of the equation.
2.1 + -2.1 = 2.1 + -2.1

Combine like terms: 2.1 + -2.1 = 0.0
0.0 = 2.1 + -2.1

Combine like terms: 2.1 + -2.1 = 0.0
0.0 = 0.0

Solving
0.0 = 0.0

Couldn't find a variable to solve for.

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

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