10(r-2)=r+7

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Solution for 10(r-2)=r+7 equation:


Simplifying
10(r + -2) = r + 7

Reorder the terms:
10(-2 + r) = r + 7
(-2 * 10 + r * 10) = r + 7
(-20 + 10r) = r + 7

Reorder the terms:
-20 + 10r = 7 + r

Solving
-20 + 10r = 7 + 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.
-20 + 10r + -1r = 7 + r + -1r

Combine like terms: 10r + -1r = 9r
-20 + 9r = 7 + r + -1r

Combine like terms: r + -1r = 0
-20 + 9r = 7 + 0
-20 + 9r = 7

Add '20' to each side of the equation.
-20 + 20 + 9r = 7 + 20

Combine like terms: -20 + 20 = 0
0 + 9r = 7 + 20
9r = 7 + 20

Combine like terms: 7 + 20 = 27
9r = 27

Divide each side by '9'.
r = 3

Simplifying
r = 3

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