2(r+5)-3=3(r-8)+21

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Solution for 2(r+5)-3=3(r-8)+21 equation:


Simplifying
2(r + 5) + -3 = 3(r + -8) + 21

Reorder the terms:
2(5 + r) + -3 = 3(r + -8) + 21
(5 * 2 + r * 2) + -3 = 3(r + -8) + 21
(10 + 2r) + -3 = 3(r + -8) + 21

Reorder the terms:
10 + -3 + 2r = 3(r + -8) + 21

Combine like terms: 10 + -3 = 7
7 + 2r = 3(r + -8) + 21

Reorder the terms:
7 + 2r = 3(-8 + r) + 21
7 + 2r = (-8 * 3 + r * 3) + 21
7 + 2r = (-24 + 3r) + 21

Reorder the terms:
7 + 2r = -24 + 21 + 3r

Combine like terms: -24 + 21 = -3
7 + 2r = -3 + 3r

Solving
7 + 2r = -3 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
7 + 2r + -3r = -3 + 3r + -3r

Combine like terms: 2r + -3r = -1r
7 + -1r = -3 + 3r + -3r

Combine like terms: 3r + -3r = 0
7 + -1r = -3 + 0
7 + -1r = -3

Add '-7' to each side of the equation.
7 + -7 + -1r = -3 + -7

Combine like terms: 7 + -7 = 0
0 + -1r = -3 + -7
-1r = -3 + -7

Combine like terms: -3 + -7 = -10
-1r = -10

Divide each side by '-1'.
r = 10

Simplifying
r = 10

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