7r=2r-20

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Solution for 7r=2r-20 equation: 


Simplifying
7r = 2r + -20

Reorder the terms:
7r = -20 + 2r

Solving
7r = -20 + 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.
7r + -2r = -20 + 2r + -2r

Combine like terms: 7r + -2r = 5r
5r = -20 + 2r + -2r

Combine like terms: 2r + -2r = 0
5r = -20 + 0
5r = -20

Divide each side by '5'.
r = -4

Simplifying
r = -4

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