3r+12=4r-1

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Solution for 3r+12=4r-1 equation:


Simplifying
3r + 12 = 4r + -1

Reorder the terms:
12 + 3r = 4r + -1

Reorder the terms:
12 + 3r = -1 + 4r

Solving
12 + 3r = -1 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
12 + 3r + -4r = -1 + 4r + -4r

Combine like terms: 3r + -4r = -1r
12 + -1r = -1 + 4r + -4r

Combine like terms: 4r + -4r = 0
12 + -1r = -1 + 0
12 + -1r = -1

Add '-12' to each side of the equation.
12 + -12 + -1r = -1 + -12

Combine like terms: 12 + -12 = 0
0 + -1r = -1 + -12
-1r = -1 + -12

Combine like terms: -1 + -12 = -13
-1r = -13

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

Simplifying
r = 13

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