-40=2(3+6r)-2(-r-5)

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Solution for -40=2(3+6r)-2(-r-5) equation:


Simplifying
-40 = 2(3 + 6r) + -2(-1r + -5)
-40 = (3 * 2 + 6r * 2) + -2(-1r + -5)
-40 = (6 + 12r) + -2(-1r + -5)

Reorder the terms:
-40 = 6 + 12r + -2(-5 + -1r)
-40 = 6 + 12r + (-5 * -2 + -1r * -2)
-40 = 6 + 12r + (10 + 2r)

Reorder the terms:
-40 = 6 + 10 + 12r + 2r

Combine like terms: 6 + 10 = 16
-40 = 16 + 12r + 2r

Combine like terms: 12r + 2r = 14r
-40 = 16 + 14r

Solving
-40 = 16 + 14r

Solving for variable 'r'.

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

Add '-14r' to each side of the equation.
-40 + -14r = 16 + 14r + -14r

Combine like terms: 14r + -14r = 0
-40 + -14r = 16 + 0
-40 + -14r = 16

Add '40' to each side of the equation.
-40 + 40 + -14r = 16 + 40

Combine like terms: -40 + 40 = 0
0 + -14r = 16 + 40
-14r = 16 + 40

Combine like terms: 16 + 40 = 56
-14r = 56

Divide each side by '-14'.
r = -4

Simplifying
r = -4

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