8+3r-4=9r+40-2r

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Solution for 8+3r-4=9r+40-2r equation:


Simplifying
8 + 3r + -4 = 9r + 40 + -2r

Reorder the terms:
8 + -4 + 3r = 9r + 40 + -2r

Combine like terms: 8 + -4 = 4
4 + 3r = 9r + 40 + -2r

Reorder the terms:
4 + 3r = 40 + 9r + -2r

Combine like terms: 9r + -2r = 7r
4 + 3r = 40 + 7r

Solving
4 + 3r = 40 + 7r

Solving for variable 'r'.

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

Add '-7r' to each side of the equation.
4 + 3r + -7r = 40 + 7r + -7r

Combine like terms: 3r + -7r = -4r
4 + -4r = 40 + 7r + -7r

Combine like terms: 7r + -7r = 0
4 + -4r = 40 + 0
4 + -4r = 40

Add '-4' to each side of the equation.
4 + -4 + -4r = 40 + -4

Combine like terms: 4 + -4 = 0
0 + -4r = 40 + -4
-4r = 40 + -4

Combine like terms: 40 + -4 = 36
-4r = 36

Divide each side by '-4'.
r = -9

Simplifying
r = -9

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