8+r=3r-4

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Solution for 8+r=3r-4 equation:


Simplifying
8 + r = 3r + -4

Reorder the terms:
8 + r = -4 + 3r

Solving
8 + r = -4 + 3r

Solving for variable 'r'.

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

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

Combine like terms: r + -3r = -2r
8 + -2r = -4 + 3r + -3r

Combine like terms: 3r + -3r = 0
8 + -2r = -4 + 0
8 + -2r = -4

Add '-8' to each side of the equation.
8 + -8 + -2r = -4 + -8

Combine like terms: 8 + -8 = 0
0 + -2r = -4 + -8
-2r = -4 + -8

Combine like terms: -4 + -8 = -12
-2r = -12

Divide each side by '-2'.
r = 6

Simplifying
r = 6

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