r+10-3=12

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Solution for r+10-3=12 equation: 


Simplifying
r + 10 + -3 = 12

Reorder the terms:
10 + -3 + r = 12

Combine like terms: 10 + -3 = 7
7 + r = 12

Solving
7 + r = 12

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + r = 12 + -7

Combine like terms: 7 + -7 = 0
0 + r = 12 + -7
r = 12 + -7

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

Simplifying
r = 5

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