15=1-7r-7r

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Solution for 15=1-7r-7r equation:


Simplifying
15 = 1 + -7r + -7r

Combine like terms: -7r + -7r = -14r
15 = 1 + -14r

Solving
15 = 1 + -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.
15 + 14r = 1 + -14r + 14r

Combine like terms: -14r + 14r = 0
15 + 14r = 1 + 0
15 + 14r = 1

Add '-15' to each side of the equation.
15 + -15 + 14r = 1 + -15

Combine like terms: 15 + -15 = 0
0 + 14r = 1 + -15
14r = 1 + -15

Combine like terms: 1 + -15 = -14
14r = -14

Divide each side by '14'.
r = -1

Simplifying
r = -1

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