15r-6+10-3r=40

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Solution for 15r-6+10-3r=40 equation:


Simplifying
15r + -6 + 10 + -3r = 40

Reorder the terms:
-6 + 10 + 15r + -3r = 40

Combine like terms: -6 + 10 = 4
4 + 15r + -3r = 40

Combine like terms: 15r + -3r = 12r
4 + 12r = 40

Solving
4 + 12r = 40

Solving for variable 'r'.

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

Add '-4' to each side of the equation.
4 + -4 + 12r = 40 + -4

Combine like terms: 4 + -4 = 0
0 + 12r = 40 + -4
12r = 40 + -4

Combine like terms: 40 + -4 = 36
12r = 36

Divide each side by '12'.
r = 3

Simplifying
r = 3

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