8+4=10+2r

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Solution for 8+4=10+2r equation:


Simplifying
8 + 4 = 10 + 2r

Combine like terms: 8 + 4 = 12
12 = 10 + 2r

Solving
12 = 10 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
12 + -2r = 10 + 2r + -2r

Combine like terms: 2r + -2r = 0
12 + -2r = 10 + 0
12 + -2r = 10

Add '-12' to each side of the equation.
12 + -12 + -2r = 10 + -12

Combine like terms: 12 + -12 = 0
0 + -2r = 10 + -12
-2r = 10 + -12

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

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

Simplifying
r = 1

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