2(5r-7)=-20+8r

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Solution for 2(5r-7)=-20+8r equation:


Simplifying
2(5r + -7) = -20 + 8r

Reorder the terms:
2(-7 + 5r) = -20 + 8r
(-7 * 2 + 5r * 2) = -20 + 8r
(-14 + 10r) = -20 + 8r

Solving
-14 + 10r = -20 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
-14 + 10r + -8r = -20 + 8r + -8r

Combine like terms: 10r + -8r = 2r
-14 + 2r = -20 + 8r + -8r

Combine like terms: 8r + -8r = 0
-14 + 2r = -20 + 0
-14 + 2r = -20

Add '14' to each side of the equation.
-14 + 14 + 2r = -20 + 14

Combine like terms: -14 + 14 = 0
0 + 2r = -20 + 14
2r = -20 + 14

Combine like terms: -20 + 14 = -6
2r = -6

Divide each side by '2'.
r = -3

Simplifying
r = -3

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