3(2r+5)-7=

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Solution for 3(2r+5)-7= equation:


Simplifying
3(2r + 5) + -7 = 0

Reorder the terms:
3(5 + 2r) + -7 = 0
(5 * 3 + 2r * 3) + -7 = 0
(15 + 6r) + -7 = 0

Reorder the terms:
15 + -7 + 6r = 0

Combine like terms: 15 + -7 = 8
8 + 6r = 0

Solving
8 + 6r = 0

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 6r = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 6r = 0 + -8
6r = 0 + -8

Combine like terms: 0 + -8 = -8
6r = -8

Divide each side by '6'.
r = -1.333333333

Simplifying
r = -1.333333333

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