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

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


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

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

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

Reorder the terms:
1 + 7r = 3 + 9r + -4r

Combine like terms: 9r + -4r = 5r
1 + 7r = 3 + 5r

Solving
1 + 7r = 3 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
1 + 7r + -5r = 3 + 5r + -5r

Combine like terms: 7r + -5r = 2r
1 + 2r = 3 + 5r + -5r

Combine like terms: 5r + -5r = 0
1 + 2r = 3 + 0
1 + 2r = 3

Add '-1' to each side of the equation.
1 + -1 + 2r = 3 + -1

Combine like terms: 1 + -1 = 0
0 + 2r = 3 + -1
2r = 3 + -1

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

Divide each side by '2'.
r = 1

Simplifying
r = 1

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