5(4.2+-0.4y)+2y=21

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Solution for 5(4.2+-0.4y)+2y=21 equation: 


Simplifying
5(4.2 + -0.4y) + 2y = 21
(4.2 * 5 + -0.4y * 5) + 2y = 21
(21 + -2y) + 2y = 21

Combine like terms: -2y + 2y = 0
21 + 0 = 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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