10=9+r

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Solution for 10=9+r equation:


Simplifying
10 = 9 + r

Solving
10 = 9 + 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.
10 + -1r = 9 + r + -1r

Combine like terms: r + -1r = 0
10 + -1r = 9 + 0
10 + -1r = 9

Add '-10' to each side of the equation.
10 + -10 + -1r = 9 + -10

Combine like terms: 10 + -10 = 0
0 + -1r = 9 + -10
-1r = 9 + -10

Combine like terms: 9 + -10 = -1
-1r = -1

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

Simplifying
r = 1

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