7r-5=9r-7

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Solution for 7r-5=9r-7 equation:


Simplifying
7r + -5 = 9r + -7

Reorder the terms:
-5 + 7r = 9r + -7

Reorder the terms:
-5 + 7r = -7 + 9r

Solving
-5 + 7r = -7 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
-5 + 7r + -9r = -7 + 9r + -9r

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

Combine like terms: 9r + -9r = 0
-5 + -2r = -7 + 0
-5 + -2r = -7

Add '5' to each side of the equation.
-5 + 5 + -2r = -7 + 5

Combine like terms: -5 + 5 = 0
0 + -2r = -7 + 5
-2r = -7 + 5

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

Divide each side by '-2'.
r = 1

Simplifying
r = 1

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