3r-7=11+r

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Solution for 3r-7=11+r equation:


Simplifying
3r + -7 = 11 + r

Reorder the terms:
-7 + 3r = 11 + r

Solving
-7 + 3r = 11 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-7 + 3r + -1r = 11 + r + -1r

Combine like terms: 3r + -1r = 2r
-7 + 2r = 11 + r + -1r

Combine like terms: r + -1r = 0
-7 + 2r = 11 + 0
-7 + 2r = 11

Add '7' to each side of the equation.
-7 + 7 + 2r = 11 + 7

Combine like terms: -7 + 7 = 0
0 + 2r = 11 + 7
2r = 11 + 7

Combine like terms: 11 + 7 = 18
2r = 18

Divide each side by '2'.
r = 9

Simplifying
r = 9

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