-8r+7(8r+4)=172

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Solution for -8r+7(8r+4)=172 equation:


Simplifying
-8r + 7(8r + 4) = 172

Reorder the terms:
-8r + 7(4 + 8r) = 172
-8r + (4 * 7 + 8r * 7) = 172
-8r + (28 + 56r) = 172

Reorder the terms:
28 + -8r + 56r = 172

Combine like terms: -8r + 56r = 48r
28 + 48r = 172

Solving
28 + 48r = 172

Solving for variable 'r'.

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

Add '-28' to each side of the equation.
28 + -28 + 48r = 172 + -28

Combine like terms: 28 + -28 = 0
0 + 48r = 172 + -28
48r = 172 + -28

Combine like terms: 172 + -28 = 144
48r = 144

Divide each side by '48'.
r = 3

Simplifying
r = 3

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