4(5r+5)=10(4r-4)

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Solution for 4(5r+5)=10(4r-4) equation:


Simplifying
4(5r + 5) = 10(4r + -4)

Reorder the terms:
4(5 + 5r) = 10(4r + -4)
(5 * 4 + 5r * 4) = 10(4r + -4)
(20 + 20r) = 10(4r + -4)

Reorder the terms:
20 + 20r = 10(-4 + 4r)
20 + 20r = (-4 * 10 + 4r * 10)
20 + 20r = (-40 + 40r)

Solving
20 + 20r = -40 + 40r

Solving for variable 'r'.

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

Add '-40r' to each side of the equation.
20 + 20r + -40r = -40 + 40r + -40r

Combine like terms: 20r + -40r = -20r
20 + -20r = -40 + 40r + -40r

Combine like terms: 40r + -40r = 0
20 + -20r = -40 + 0
20 + -20r = -40

Add '-20' to each side of the equation.
20 + -20 + -20r = -40 + -20

Combine like terms: 20 + -20 = 0
0 + -20r = -40 + -20
-20r = -40 + -20

Combine like terms: -40 + -20 = -60
-20r = -60

Divide each side by '-20'.
r = 3

Simplifying
r = 3

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