7r-4-8r=5

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Solution for 7r-4-8r=5 equation:


Simplifying
7r + -4 + -8r = 5

Reorder the terms:
-4 + 7r + -8r = 5

Combine like terms: 7r + -8r = -1r
-4 + -1r = 5

Solving
-4 + -1r = 5

Solving for variable 'r'.

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

Add '4' to each side of the equation.
-4 + 4 + -1r = 5 + 4

Combine like terms: -4 + 4 = 0
0 + -1r = 5 + 4
-1r = 5 + 4

Combine like terms: 5 + 4 = 9
-1r = 9

Divide each side by '-1'.
r = -9

Simplifying
r = -9

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