6+7=13+7r

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Solution for 6+7=13+7r equation: 


Simplifying
6 + 7 = 13 + 7r

Combine like terms: 6 + 7 = 13
13 = 13 + 7r

Add '-13' to each side of the equation.
13 + -13 = 13 + -13 + 7r

Combine like terms: 13 + -13 = 0
0 = 13 + -13 + 7r

Combine like terms: 13 + -13 = 0
0 = 0 + 7r
0 = 7r

Solving
0 = 7r

Solving for variable 'r'.

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

Add '-7r' to each side of the equation.
0 + -7r = 7r + -7r
Remove the zero:
-7r = 7r + -7r

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

Divide each side by '-7'.
r = 0

Simplifying
r = 0

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