4(5r+15)=20(4e-12)

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Solution for 4(5r+15)=20(4e-12) equation:


Simplifying
4(5r + 15) = 20(4e + -12)

Reorder the terms:
4(15 + 5r) = 20(4e + -12)
(15 * 4 + 5r * 4) = 20(4e + -12)
(60 + 20r) = 20(4e + -12)

Reorder the terms:
60 + 20r = 20(-12 + 4e)
60 + 20r = (-12 * 20 + 4e * 20)
60 + 20r = (-240 + 80e)

Solving
60 + 20r = -240 + 80e

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-60' to each side of the equation.
60 + -60 + 20r = -240 + -60 + 80e

Combine like terms: 60 + -60 = 0
0 + 20r = -240 + -60 + 80e
20r = -240 + -60 + 80e

Combine like terms: -240 + -60 = -300
20r = -300 + 80e

Divide each side by '20'.
r = -15 + 4e

Simplifying
r = -15 + 4e

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