3(5r+2)-1=2(r-4)

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Solution for 3(5r+2)-1=2(r-4) equation:


Simplifying
3(5r + 2) + -1 = 2(r + -4)

Reorder the terms:
3(2 + 5r) + -1 = 2(r + -4)
(2 * 3 + 5r * 3) + -1 = 2(r + -4)
(6 + 15r) + -1 = 2(r + -4)

Reorder the terms:
6 + -1 + 15r = 2(r + -4)

Combine like terms: 6 + -1 = 5
5 + 15r = 2(r + -4)

Reorder the terms:
5 + 15r = 2(-4 + r)
5 + 15r = (-4 * 2 + r * 2)
5 + 15r = (-8 + 2r)

Solving
5 + 15r = -8 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
5 + 15r + -2r = -8 + 2r + -2r

Combine like terms: 15r + -2r = 13r
5 + 13r = -8 + 2r + -2r

Combine like terms: 2r + -2r = 0
5 + 13r = -8 + 0
5 + 13r = -8

Add '-5' to each side of the equation.
5 + -5 + 13r = -8 + -5

Combine like terms: 5 + -5 = 0
0 + 13r = -8 + -5
13r = -8 + -5

Combine like terms: -8 + -5 = -13
13r = -13

Divide each side by '13'.
r = -1

Simplifying
r = -1

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