3(4r+9)-2(r-4)=

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Solution for 3(4r+9)-2(r-4)= equation:


Simplifying
3(4r + 9) + -2(r + -4) = 0

Reorder the terms:
3(9 + 4r) + -2(r + -4) = 0
(9 * 3 + 4r * 3) + -2(r + -4) = 0
(27 + 12r) + -2(r + -4) = 0

Reorder the terms:
27 + 12r + -2(-4 + r) = 0
27 + 12r + (-4 * -2 + r * -2) = 0
27 + 12r + (8 + -2r) = 0

Reorder the terms:
27 + 8 + 12r + -2r = 0

Combine like terms: 27 + 8 = 35
35 + 12r + -2r = 0

Combine like terms: 12r + -2r = 10r
35 + 10r = 0

Solving
35 + 10r = 0

Solving for variable 'r'.

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

Add '-35' to each side of the equation.
35 + -35 + 10r = 0 + -35

Combine like terms: 35 + -35 = 0
0 + 10r = 0 + -35
10r = 0 + -35

Combine like terms: 0 + -35 = -35
10r = -35

Divide each side by '10'.
r = -3.5

Simplifying
r = -3.5

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