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

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


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

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

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

Reorder the terms:
4 + -12 + 2r + 3r = 9

Combine like terms: 4 + -12 = -8
-8 + 2r + 3r = 9

Combine like terms: 2r + 3r = 5r
-8 + 5r = 9

Solving
-8 + 5r = 9

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 + 5r = 9 + 8

Combine like terms: -8 + 8 = 0
0 + 5r = 9 + 8
5r = 9 + 8

Combine like terms: 9 + 8 = 17
5r = 17

Divide each side by '5'.
r = 3.4

Simplifying
r = 3.4

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