9r-7=15r-(4r+23)

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Solution for 9r-7=15r-(4r+23) equation:


Simplifying
9r + -7 = 15r + -1(4r + 23)

Reorder the terms:
-7 + 9r = 15r + -1(4r + 23)

Reorder the terms:
-7 + 9r = 15r + -1(23 + 4r)
-7 + 9r = 15r + (23 * -1 + 4r * -1)
-7 + 9r = 15r + (-23 + -4r)

Reorder the terms:
-7 + 9r = -23 + 15r + -4r

Combine like terms: 15r + -4r = 11r
-7 + 9r = -23 + 11r

Solving
-7 + 9r = -23 + 11r

Solving for variable 'r'.

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

Add '-11r' to each side of the equation.
-7 + 9r + -11r = -23 + 11r + -11r

Combine like terms: 9r + -11r = -2r
-7 + -2r = -23 + 11r + -11r

Combine like terms: 11r + -11r = 0
-7 + -2r = -23 + 0
-7 + -2r = -23

Add '7' to each side of the equation.
-7 + 7 + -2r = -23 + 7

Combine like terms: -7 + 7 = 0
0 + -2r = -23 + 7
-2r = -23 + 7

Combine like terms: -23 + 7 = -16
-2r = -16

Divide each side by '-2'.
r = 8

Simplifying
r = 8

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