.25r+.25(r+80)=51

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Solution for .25r+.25(r+80)=51 equation:


Simplifying
0.25r + 0.25(r + 80) = 51

Reorder the terms:
0.25r + 0.25(80 + r) = 51
0.25r + (80 * 0.25 + r * 0.25) = 51
0.25r + (20 + 0.25r) = 51

Reorder the terms:
20 + 0.25r + 0.25r = 51

Combine like terms: 0.25r + 0.25r = 0.5r
20 + 0.5r = 51

Solving
20 + 0.5r = 51

Solving for variable 'r'.

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

Add '-20' to each side of the equation.
20 + -20 + 0.5r = 51 + -20

Combine like terms: 20 + -20 = 0
0 + 0.5r = 51 + -20
0.5r = 51 + -20

Combine like terms: 51 + -20 = 31
0.5r = 31

Divide each side by '0.5'.
r = 62

Simplifying
r = 62

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