P1=2.5+2.5+4.75+4.75=14.5 cm
0.5 cm - 1 in
2.5 cm - 5 in
4.75 cm - 9.5 in
P2=5+5+9.5+9.5=29 in
You have to move both decimals over and then divide. So the answer is 25.
So first 180-70=110
second 360-110-90-90=360-290=70
5x+2y=11 x4
4x-3y=18 x5
20x+8y=44
20x-15y=90
23y= -46
y= -46/23 = -2
5x+2*-2=11
5x-4=11
5x=15
x=3