8+4r-7=9r+13-3r

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Solution for 8+4r-7=9r+13-3r equation:


Simplifying
8 + 4r + -7 = 9r + 13 + -3r

Reorder the terms:
8 + -7 + 4r = 9r + 13 + -3r

Combine like terms: 8 + -7 = 1
1 + 4r = 9r + 13 + -3r

Reorder the terms:
1 + 4r = 13 + 9r + -3r

Combine like terms: 9r + -3r = 6r
1 + 4r = 13 + 6r

Solving
1 + 4r = 13 + 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
1 + 4r + -6r = 13 + 6r + -6r

Combine like terms: 4r + -6r = -2r
1 + -2r = 13 + 6r + -6r

Combine like terms: 6r + -6r = 0
1 + -2r = 13 + 0
1 + -2r = 13

Add '-1' to each side of the equation.
1 + -1 + -2r = 13 + -1

Combine like terms: 1 + -1 = 0
0 + -2r = 13 + -1
-2r = 13 + -1

Combine like terms: 13 + -1 = 12
-2r = 12

Divide each side by '-2'.
r = -6

Simplifying
r = -6

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