7-2r+4r-15=3r-5

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Solution for 7-2r+4r-15=3r-5 equation:


Simplifying
7 + -2r + 4r + -15 = 3r + -5

Reorder the terms:
7 + -15 + -2r + 4r = 3r + -5

Combine like terms: 7 + -15 = -8
-8 + -2r + 4r = 3r + -5

Combine like terms: -2r + 4r = 2r
-8 + 2r = 3r + -5

Reorder the terms:
-8 + 2r = -5 + 3r

Solving
-8 + 2r = -5 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
-8 + 2r + -3r = -5 + 3r + -3r

Combine like terms: 2r + -3r = -1r
-8 + -1r = -5 + 3r + -3r

Combine like terms: 3r + -3r = 0
-8 + -1r = -5 + 0
-8 + -1r = -5

Add '8' to each side of the equation.
-8 + 8 + -1r = -5 + 8

Combine like terms: -8 + 8 = 0
0 + -1r = -5 + 8
-1r = -5 + 8

Combine like terms: -5 + 8 = 3
-1r = 3

Divide each side by '-1'.
r = -3

Simplifying
r = -3

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