1-r=15-3r

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Solution for 1-r=15-3r equation:


Simplifying
1 + -1r = 15 + -3r

Solving
1 + -1r = 15 + -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.
1 + -1r + 3r = 15 + -3r + 3r

Combine like terms: -1r + 3r = 2r
1 + 2r = 15 + -3r + 3r

Combine like terms: -3r + 3r = 0
1 + 2r = 15 + 0
1 + 2r = 15

Add '-1' to each side of the equation.
1 + -1 + 2r = 15 + -1

Combine like terms: 1 + -1 = 0
0 + 2r = 15 + -1
2r = 15 + -1

Combine like terms: 15 + -1 = 14
2r = 14

Divide each side by '2'.
r = 7

Simplifying
r = 7

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