9r-7=8+4(r+5)

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Solution for 9r-7=8+4(r+5) equation:


Simplifying
9r + -7 = 8 + 4(r + 5)

Reorder the terms:
-7 + 9r = 8 + 4(r + 5)

Reorder the terms:
-7 + 9r = 8 + 4(5 + r)
-7 + 9r = 8 + (5 * 4 + r * 4)
-7 + 9r = 8 + (20 + 4r)

Combine like terms: 8 + 20 = 28
-7 + 9r = 28 + 4r

Solving
-7 + 9r = 28 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-7 + 9r + -4r = 28 + 4r + -4r

Combine like terms: 9r + -4r = 5r
-7 + 5r = 28 + 4r + -4r

Combine like terms: 4r + -4r = 0
-7 + 5r = 28 + 0
-7 + 5r = 28

Add '7' to each side of the equation.
-7 + 7 + 5r = 28 + 7

Combine like terms: -7 + 7 = 0
0 + 5r = 28 + 7
5r = 28 + 7

Combine like terms: 28 + 7 = 35
5r = 35

Divide each side by '5'.
r = 7

Simplifying
r = 7

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