13r-3(r-3)=3(4r-5)-6

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Solution for 13r-3(r-3)=3(4r-5)-6 equation:


Simplifying
13r + -3(r + -3) = 3(4r + -5) + -6

Reorder the terms:
13r + -3(-3 + r) = 3(4r + -5) + -6
13r + (-3 * -3 + r * -3) = 3(4r + -5) + -6
13r + (9 + -3r) = 3(4r + -5) + -6

Reorder the terms:
9 + 13r + -3r = 3(4r + -5) + -6

Combine like terms: 13r + -3r = 10r
9 + 10r = 3(4r + -5) + -6

Reorder the terms:
9 + 10r = 3(-5 + 4r) + -6
9 + 10r = (-5 * 3 + 4r * 3) + -6
9 + 10r = (-15 + 12r) + -6

Reorder the terms:
9 + 10r = -15 + -6 + 12r

Combine like terms: -15 + -6 = -21
9 + 10r = -21 + 12r

Solving
9 + 10r = -21 + 12r

Solving for variable 'r'.

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

Add '-12r' to each side of the equation.
9 + 10r + -12r = -21 + 12r + -12r

Combine like terms: 10r + -12r = -2r
9 + -2r = -21 + 12r + -12r

Combine like terms: 12r + -12r = 0
9 + -2r = -21 + 0
9 + -2r = -21

Add '-9' to each side of the equation.
9 + -9 + -2r = -21 + -9

Combine like terms: 9 + -9 = 0
0 + -2r = -21 + -9
-2r = -21 + -9

Combine like terms: -21 + -9 = -30
-2r = -30

Divide each side by '-2'.
r = 15

Simplifying
r = 15

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