13-7r=-8r-5(3r+7)

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Solution for 13-7r=-8r-5(3r+7) equation:


Simplifying
13 + -7r = -8r + -5(3r + 7)

Reorder the terms:
13 + -7r = -8r + -5(7 + 3r)
13 + -7r = -8r + (7 * -5 + 3r * -5)
13 + -7r = -8r + (-35 + -15r)

Reorder the terms:
13 + -7r = -35 + -8r + -15r

Combine like terms: -8r + -15r = -23r
13 + -7r = -35 + -23r

Solving
13 + -7r = -35 + -23r

Solving for variable 'r'.

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

Add '23r' to each side of the equation.
13 + -7r + 23r = -35 + -23r + 23r

Combine like terms: -7r + 23r = 16r
13 + 16r = -35 + -23r + 23r

Combine like terms: -23r + 23r = 0
13 + 16r = -35 + 0
13 + 16r = -35

Add '-13' to each side of the equation.
13 + -13 + 16r = -35 + -13

Combine like terms: 13 + -13 = 0
0 + 16r = -35 + -13
16r = -35 + -13

Combine like terms: -35 + -13 = -48
16r = -48

Divide each side by '16'.
r = -3

Simplifying
r = -3

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