-2(4-9r)=(10+10r)

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Solution for -2(4-9r)=(10+10r) equation:


Simplifying
-2(4 + -9r) = (10 + 10r)
(4 * -2 + -9r * -2) = (10 + 10r)
(-8 + 18r) = (10 + 10r)

Remove parenthesis around (10 + 10r)
-8 + 18r = 10 + 10r

Solving
-8 + 18r = 10 + 10r

Solving for variable 'r'.

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

Add '-10r' to each side of the equation.
-8 + 18r + -10r = 10 + 10r + -10r

Combine like terms: 18r + -10r = 8r
-8 + 8r = 10 + 10r + -10r

Combine like terms: 10r + -10r = 0
-8 + 8r = 10 + 0
-8 + 8r = 10

Add '8' to each side of the equation.
-8 + 8 + 8r = 10 + 8

Combine like terms: -8 + 8 = 0
0 + 8r = 10 + 8
8r = 10 + 8

Combine like terms: 10 + 8 = 18
8r = 18

Divide each side by '8'.
r = 2.25

Simplifying
r = 2.25

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