4R size is 4" × 6"; 10 cm x 15 cm
Other photographic print sizes are 3R (3½" × 5"; 9 cm x 13 cm), 4D (4½" × 6"), the 5R (5" × 7"; 13 cm x 18 cm) and 6R (6" × 8"; double the 4R). The print photo size 8R (8" × 10"; 20 cm x 25 cm) is also well known.
Chat with our AI personalities
-2=4r+s s=-4r-2 or s=-(4r+2)
4r + 4 = 5r 4r - r = 3r 4r x r = 4r^2 4r/r = 4
It is 4r + 12s
Since 4R and R both contain a like term (R), you can combine them: 5R would be 4R plus R simplified
The above set of three terms cannot be simplified.