R+12+r+16+r-3=180

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Solution for R+12+r+16+r-3=180 equation:


Simplifying
R + 12 + r + 16 + r + -3 = 180

Reorder the terms:
12 + 16 + -3 + R + r + r = 180

Combine like terms: 12 + 16 = 28
28 + -3 + R + r + r = 180

Combine like terms: 28 + -3 = 25
25 + R + r + r = 180

Combine like terms: r + r = 2r
25 + R + 2r = 180

Solving
25 + R + 2r = 180

Solving for variable 'R'.

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

Add '-25' to each side of the equation.
25 + R + -25 + 2r = 180 + -25

Reorder the terms:
25 + -25 + R + 2r = 180 + -25

Combine like terms: 25 + -25 = 0
0 + R + 2r = 180 + -25
R + 2r = 180 + -25

Combine like terms: 180 + -25 = 155
R + 2r = 155

Add '-2r' to each side of the equation.
R + 2r + -2r = 155 + -2r

Combine like terms: 2r + -2r = 0
R + 0 = 155 + -2r
R = 155 + -2r

Simplifying
R = 155 + -2r

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