7r-3-4=5r-8+r-7

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Solution for 7r-3-4=5r-8+r-7 equation:


Simplifying
7r + -3 + -4 = 5r + -8 + r + -7

Reorder the terms:
-3 + -4 + 7r = 5r + -8 + r + -7

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

Reorder the terms:
-7 + 7r = -8 + -7 + 5r + r

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

Combine like terms: 5r + r = 6r
-7 + 7r = -15 + 6r

Solving
-7 + 7r = -15 + 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.
-7 + 7r + -6r = -15 + 6r + -6r

Combine like terms: 7r + -6r = 1r
-7 + 1r = -15 + 6r + -6r

Combine like terms: 6r + -6r = 0
-7 + 1r = -15 + 0
-7 + 1r = -15

Add '7' to each side of the equation.
-7 + 7 + 1r = -15 + 7

Combine like terms: -7 + 7 = 0
0 + 1r = -15 + 7
1r = -15 + 7

Combine like terms: -15 + 7 = -8
1r = -8

Divide each side by '1'.
r = -8

Simplifying
r = -8

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