==============================================================
1,(8)=1 8/9
-4.92y-(0.08y+5.12)=-0.88-y
-4.92y-0.08y-5.12 = -0.88 - y
-4.92y - 0.08y + y = -0.88 + 5.12
-4y = 4.24
y = -4.24/4
y = -1.06
1]3+2=5[см]-1 И 2 стороны; 2]9-5=4[см]-3 сторона Ответ:4cм.
P = 5+ 5+2+2= 14 см или Р= 5 *2 + 2*2 = 14 см