2(-2r)-5=-2(r+5)+8r

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Solution for 2(-2r)-5=-2(r+5)+8r equation:


Simplifying
2(-2r) + -5 = -2(r + 5) + 8r

Remove parenthesis around (-2r)
2 * -2r + -5 = -2(r + 5) + 8r

Multiply 2 * -2
-4r + -5 = -2(r + 5) + 8r

Reorder the terms:
-5 + -4r = -2(r + 5) + 8r

Reorder the terms:
-5 + -4r = -2(5 + r) + 8r
-5 + -4r = (5 * -2 + r * -2) + 8r
-5 + -4r = (-10 + -2r) + 8r

Combine like terms: -2r + 8r = 6r
-5 + -4r = -10 + 6r

Solving
-5 + -4r = -10 + 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
-5 + -4r + -6r = -10 + 6r + -6r

Combine like terms: -4r + -6r = -10r
-5 + -10r = -10 + 6r + -6r

Combine like terms: 6r + -6r = 0
-5 + -10r = -10 + 0
-5 + -10r = -10

Add '5' to each side of the equation.
-5 + 5 + -10r = -10 + 5

Combine like terms: -5 + 5 = 0
0 + -10r = -10 + 5
-10r = -10 + 5

Combine like terms: -10 + 5 = -5
-10r = -5

Divide each side by '-10'.
r = 0.5

Simplifying
r = 0.5

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