0.3(2r) - 0.3(3) = 0.2(r) + 0.9
Clear parentheses:
0.6r - 0.9 = 0.2r + 0.9
Multiply each side by 10:
6r - 9 = 2r + 9
Add 9 to each side:
6r = 2r + 18
Subtract 2r from each side:
4r = 18
Divide each side by 4:
r = 18/4 = 4.5
one and a half.
what specs are you interested in? Refrigerant, electrical, mechanical, pressures, temperatures? Can you be a little more specific?