-9r-4=10r+15

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Solution for -9r-4=10r+15 equation:


Simplifying
-9r + -4 = 10r + 15

Reorder the terms:
-4 + -9r = 10r + 15

Reorder the terms:
-4 + -9r = 15 + 10r

Solving
-4 + -9r = 15 + 10r

Solving for variable 'r'.

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

Add '-10r' to each side of the equation.
-4 + -9r + -10r = 15 + 10r + -10r

Combine like terms: -9r + -10r = -19r
-4 + -19r = 15 + 10r + -10r

Combine like terms: 10r + -10r = 0
-4 + -19r = 15 + 0
-4 + -19r = 15

Add '4' to each side of the equation.
-4 + 4 + -19r = 15 + 4

Combine like terms: -4 + 4 = 0
0 + -19r = 15 + 4
-19r = 15 + 4

Combine like terms: 15 + 4 = 19
-19r = 19

Divide each side by '-19'.
r = -1

Simplifying
r = -1

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