3(3r+9)-2(r-1)=

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Solution for 3(3r+9)-2(r-1)= equation:


Simplifying
3(3r + 9) + -2(r + -1) = 0

Reorder the terms:
3(9 + 3r) + -2(r + -1) = 0
(9 * 3 + 3r * 3) + -2(r + -1) = 0
(27 + 9r) + -2(r + -1) = 0

Reorder the terms:
27 + 9r + -2(-1 + r) = 0
27 + 9r + (-1 * -2 + r * -2) = 0
27 + 9r + (2 + -2r) = 0

Reorder the terms:
27 + 2 + 9r + -2r = 0

Combine like terms: 27 + 2 = 29
29 + 9r + -2r = 0

Combine like terms: 9r + -2r = 7r
29 + 7r = 0

Solving
29 + 7r = 0

Solving for variable 'r'.

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

Add '-29' to each side of the equation.
29 + -29 + 7r = 0 + -29

Combine like terms: 29 + -29 = 0
0 + 7r = 0 + -29
7r = 0 + -29

Combine like terms: 0 + -29 = -29
7r = -29

Divide each side by '7'.
r = -4.142857143

Simplifying
r = -4.142857143

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