4(r+20)=.2(20r+400)

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Solution for 4(r+20)=.2(20r+400) equation:


Simplifying
4(r + 20) = 0.2(20r + 400)

Reorder the terms:
4(20 + r) = 0.2(20r + 400)
(20 * 4 + r * 4) = 0.2(20r + 400)
(80 + 4r) = 0.2(20r + 400)

Reorder the terms:
80 + 4r = 0.2(400 + 20r)
80 + 4r = (400 * 0.2 + 20r * 0.2)
80 + 4r = (80 + 4r)

Add '-80' to each side of the equation.
80 + -80 + 4r = 80 + -80 + 4r

Combine like terms: 80 + -80 = 0
0 + 4r = 80 + -80 + 4r
4r = 80 + -80 + 4r

Combine like terms: 80 + -80 = 0
4r = 0 + 4r
4r = 4r

Add '-4r' to each side of the equation.
4r + -4r = 4r + -4r

Combine like terms: 4r + -4r = 0
0 = 4r + -4r

Combine like terms: 4r + -4r = 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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