10+r=3r+18

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Solution for 10+r=3r+18 equation:


Simplifying
10 + r = 3r + 18

Reorder the terms:
10 + r = 18 + 3r

Solving
10 + r = 18 + 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.
10 + r + -3r = 18 + 3r + -3r

Combine like terms: r + -3r = -2r
10 + -2r = 18 + 3r + -3r

Combine like terms: 3r + -3r = 0
10 + -2r = 18 + 0
10 + -2r = 18

Add '-10' to each side of the equation.
10 + -10 + -2r = 18 + -10

Combine like terms: 10 + -10 = 0
0 + -2r = 18 + -10
-2r = 18 + -10

Combine like terms: 18 + -10 = 8
-2r = 8

Divide each side by '-2'.
r = -4

Simplifying
r = -4

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