3r+7r-5=45

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Solution for 3r+7r-5=45 equation:


Simplifying
3r + 7r + -5 = 45

Reorder the terms:
-5 + 3r + 7r = 45

Combine like terms: 3r + 7r = 10r
-5 + 10r = 45

Solving
-5 + 10r = 45

Solving for variable 'r'.

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

Add '5' to each side of the equation.
-5 + 5 + 10r = 45 + 5

Combine like terms: -5 + 5 = 0
0 + 10r = 45 + 5
10r = 45 + 5

Combine like terms: 45 + 5 = 50
10r = 50

Divide each side by '10'.
r = 5

Simplifying
r = 5

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