3(3r+5)-2(r+4)=

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Solution for 3(3r+5)-2(r+4)= equation:


Simplifying
3(3r + 5) + -2(r + 4) = 0

Reorder the terms:
3(5 + 3r) + -2(r + 4) = 0
(5 * 3 + 3r * 3) + -2(r + 4) = 0
(15 + 9r) + -2(r + 4) = 0

Reorder the terms:
15 + 9r + -2(4 + r) = 0
15 + 9r + (4 * -2 + r * -2) = 0
15 + 9r + (-8 + -2r) = 0

Reorder the terms:
15 + -8 + 9r + -2r = 0

Combine like terms: 15 + -8 = 7
7 + 9r + -2r = 0

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

Solving
7 + 7r = 0

Solving for variable 'r'.

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

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

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

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

Divide each side by '7'.
r = -1

Simplifying
r = -1

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