7r-1+5r=13

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Solution for 7r-1+5r=13 equation:


Simplifying
7r + -1 + 5r = 13

Reorder the terms:
-1 + 7r + 5r = 13

Combine like terms: 7r + 5r = 12r
-1 + 12r = 13

Solving
-1 + 12r = 13

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + 12r = 13 + 1

Combine like terms: -1 + 1 = 0
0 + 12r = 13 + 1
12r = 13 + 1

Combine like terms: 13 + 1 = 14
12r = 14

Divide each side by '12'.
r = 1.166666667

Simplifying
r = 1.166666667

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