13=4(-7r-5)-2r

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Solution for 13=4(-7r-5)-2r equation:


Simplifying
13 = 4(-7r + -5) + -2r

Reorder the terms:
13 = 4(-5 + -7r) + -2r
13 = (-5 * 4 + -7r * 4) + -2r
13 = (-20 + -28r) + -2r

Combine like terms: -28r + -2r = -30r
13 = -20 + -30r

Solving
13 = -20 + -30r

Solving for variable 'r'.

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

Add '30r' to each side of the equation.
13 + 30r = -20 + -30r + 30r

Combine like terms: -30r + 30r = 0
13 + 30r = -20 + 0
13 + 30r = -20

Add '-13' to each side of the equation.
13 + -13 + 30r = -20 + -13

Combine like terms: 13 + -13 = 0
0 + 30r = -20 + -13
30r = -20 + -13

Combine like terms: -20 + -13 = -33
30r = -33

Divide each side by '30'.
r = -1.1

Simplifying
r = -1.1

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