-90=5(-2+4r)

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Solution for -90=5(-2+4r) equation:


Simplifying
-90 = 5(-2 + 4r)
-90 = (-2 * 5 + 4r * 5)
-90 = (-10 + 20r)

Solving
-90 = -10 + 20r

Solving for variable 'r'.

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

Add '-20r' to each side of the equation.
-90 + -20r = -10 + 20r + -20r

Combine like terms: 20r + -20r = 0
-90 + -20r = -10 + 0
-90 + -20r = -10

Add '90' to each side of the equation.
-90 + 90 + -20r = -10 + 90

Combine like terms: -90 + 90 = 0
0 + -20r = -10 + 90
-20r = -10 + 90

Combine like terms: -10 + 90 = 80
-20r = 80

Divide each side by '-20'.
r = -4

Simplifying
r = -4

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