21=6-2.3(-3)-2.7(-3)

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Solution for 21=6-2.3(-3)-2.7(-3) equation: 


Simplifying
21 = 6 + -2.3(-3) + -2.7(-3)

Multiply -2.3 * -3
21 = 6 + 6.9 + -2.7(-3)

Multiply -2.7 * -3
21 = 6 + 6.9 + 8.1

Combine like terms: 6 + 6.9 = 12.9
21 = 12.9 + 8.1

Combine like terms: 12.9 + 8.1 = 21
21 = 21

Add '-21' to each side of the equation.
21 + -21 = 21 + -21

Combine like terms: 21 + -21 = 0
0 = 21 + -21

Combine like terms: 21 + -21 = 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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