7+9r-2=8r+25-4r

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Solution for 7+9r-2=8r+25-4r equation:


Simplifying
7 + 9r + -2 = 8r + 25 + -4r

Reorder the terms:
7 + -2 + 9r = 8r + 25 + -4r

Combine like terms: 7 + -2 = 5
5 + 9r = 8r + 25 + -4r

Reorder the terms:
5 + 9r = 25 + 8r + -4r

Combine like terms: 8r + -4r = 4r
5 + 9r = 25 + 4r

Solving
5 + 9r = 25 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
5 + 9r + -4r = 25 + 4r + -4r

Combine like terms: 9r + -4r = 5r
5 + 5r = 25 + 4r + -4r

Combine like terms: 4r + -4r = 0
5 + 5r = 25 + 0
5 + 5r = 25

Add '-5' to each side of the equation.
5 + -5 + 5r = 25 + -5

Combine like terms: 5 + -5 = 0
0 + 5r = 25 + -5
5r = 25 + -5

Combine like terms: 25 + -5 = 20
5r = 20

Divide each side by '5'.
r = 4

Simplifying
r = 4

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