-2(7r+7)=25-r

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Solution for -2(7r+7)=25-r equation:


Simplifying
-2(7r + 7) = 25 + -1r

Reorder the terms:
-2(7 + 7r) = 25 + -1r
(7 * -2 + 7r * -2) = 25 + -1r
(-14 + -14r) = 25 + -1r

Solving
-14 + -14r = 25 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-14 + -14r + r = 25 + -1r + r

Combine like terms: -14r + r = -13r
-14 + -13r = 25 + -1r + r

Combine like terms: -1r + r = 0
-14 + -13r = 25 + 0
-14 + -13r = 25

Add '14' to each side of the equation.
-14 + 14 + -13r = 25 + 14

Combine like terms: -14 + 14 = 0
0 + -13r = 25 + 14
-13r = 25 + 14

Combine like terms: 25 + 14 = 39
-13r = 39

Divide each side by '-13'.
r = -3

Simplifying
r = -3

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