12=10+r

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Solution for 12=10+r equation:


Simplifying
12 = 10 + r

Solving
12 = 10 + 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.
12 + -1r = 10 + r + -1r

Combine like terms: r + -1r = 0
12 + -1r = 10 + 0
12 + -1r = 10

Add '-12' to each side of the equation.
12 + -12 + -1r = 10 + -12

Combine like terms: 12 + -12 = 0
0 + -1r = 10 + -12
-1r = 10 + -12

Combine like terms: 10 + -12 = -2
-1r = -2

Divide each side by '-1'.
r = 2

Simplifying
r = 2

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