1-2r+7=5r-7

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Solution for 1-2r+7=5r-7 equation:


Simplifying
1 + -2r + 7 = 5r + -7

Reorder the terms:
1 + 7 + -2r = 5r + -7

Combine like terms: 1 + 7 = 8
8 + -2r = 5r + -7

Reorder the terms:
8 + -2r = -7 + 5r

Solving
8 + -2r = -7 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
8 + -2r + -5r = -7 + 5r + -5r

Combine like terms: -2r + -5r = -7r
8 + -7r = -7 + 5r + -5r

Combine like terms: 5r + -5r = 0
8 + -7r = -7 + 0
8 + -7r = -7

Add '-8' to each side of the equation.
8 + -8 + -7r = -7 + -8

Combine like terms: 8 + -8 = 0
0 + -7r = -7 + -8
-7r = -7 + -8

Combine like terms: -7 + -8 = -15
-7r = -15

Divide each side by '-7'.
r = 2.142857143

Simplifying
r = 2.142857143

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