4r+7=8r-13

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Solution for 4r+7=8r-13 equation:


Simplifying
4r + 7 = 8r + -13

Reorder the terms:
7 + 4r = 8r + -13

Reorder the terms:
7 + 4r = -13 + 8r

Solving
7 + 4r = -13 + 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.
7 + 4r + -8r = -13 + 8r + -8r

Combine like terms: 4r + -8r = -4r
7 + -4r = -13 + 8r + -8r

Combine like terms: 8r + -8r = 0
7 + -4r = -13 + 0
7 + -4r = -13

Add '-7' to each side of the equation.
7 + -7 + -4r = -13 + -7

Combine like terms: 7 + -7 = 0
0 + -4r = -13 + -7
-4r = -13 + -7

Combine like terms: -13 + -7 = -20
-4r = -20

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

Simplifying
r = 5

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