-4(2r+9)=18+8r

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Solution for -4(2r+9)=18+8r equation:


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

Reorder the terms:
-4(9 + 2r) = 18 + 8r
(9 * -4 + 2r * -4) = 18 + 8r
(-36 + -8r) = 18 + 8r

Solving
-36 + -8r = 18 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
-36 + -8r + -8r = 18 + 8r + -8r

Combine like terms: -8r + -8r = -16r
-36 + -16r = 18 + 8r + -8r

Combine like terms: 8r + -8r = 0
-36 + -16r = 18 + 0
-36 + -16r = 18

Add '36' to each side of the equation.
-36 + 36 + -16r = 18 + 36

Combine like terms: -36 + 36 = 0
0 + -16r = 18 + 36
-16r = 18 + 36

Combine like terms: 18 + 36 = 54
-16r = 54

Divide each side by '-16'.
r = -3.375

Simplifying
r = -3.375

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