7(r+3)+8r=

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Solution for 7(r+3)+8r= equation:


Simplifying
7(r + 3) + 8r = 0

Reorder the terms:
7(3 + r) + 8r = 0
(3 * 7 + r * 7) + 8r = 0
(21 + 7r) + 8r = 0

Combine like terms: 7r + 8r = 15r
21 + 15r = 0

Solving
21 + 15r = 0

Solving for variable 'r'.

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

Add '-21' to each side of the equation.
21 + -21 + 15r = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 15r = 0 + -21
15r = 0 + -21

Combine like terms: 0 + -21 = -21
15r = -21

Divide each side by '15'.
r = -1.4

Simplifying
r = -1.4

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