12=5(3r+2)-(r-1)

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Solution for 12=5(3r+2)-(r-1) equation:


Simplifying
12 = 5(3r + 2) + -1(r + -1)

Reorder the terms:
12 = 5(2 + 3r) + -1(r + -1)
12 = (2 * 5 + 3r * 5) + -1(r + -1)
12 = (10 + 15r) + -1(r + -1)

Reorder the terms:
12 = 10 + 15r + -1(-1 + r)
12 = 10 + 15r + (-1 * -1 + r * -1)
12 = 10 + 15r + (1 + -1r)

Reorder the terms:
12 = 10 + 1 + 15r + -1r

Combine like terms: 10 + 1 = 11
12 = 11 + 15r + -1r

Combine like terms: 15r + -1r = 14r
12 = 11 + 14r

Solving
12 = 11 + 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.
12 + -14r = 11 + 14r + -14r

Combine like terms: 14r + -14r = 0
12 + -14r = 11 + 0
12 + -14r = 11

Add '-12' to each side of the equation.
12 + -12 + -14r = 11 + -12

Combine like terms: 12 + -12 = 0
0 + -14r = 11 + -12
-14r = 11 + -12

Combine like terms: 11 + -12 = -1
-14r = -1

Divide each side by '-14'.
r = 0.07142857143

Simplifying
r = 0.07142857143

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