10=1+7r+2

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Solution for 10=1+7r+2 equation:


Simplifying
10 = 1 + 7r + 2

Reorder the terms:
10 = 1 + 2 + 7r

Combine like terms: 1 + 2 = 3
10 = 3 + 7r

Solving
10 = 3 + 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.
10 + -7r = 3 + 7r + -7r

Combine like terms: 7r + -7r = 0
10 + -7r = 3 + 0
10 + -7r = 3

Add '-10' to each side of the equation.
10 + -10 + -7r = 3 + -10

Combine like terms: 10 + -10 = 0
0 + -7r = 3 + -10
-7r = 3 + -10

Combine like terms: 3 + -10 = -7
-7r = -7

Divide each side by '-7'.
r = 1

Simplifying
r = 1

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