Question

afla perimetru unui patrat in metri stiind ca tripland latura si scazand 140 , dubland rezultatul obtinut si adaugand 60 obtii produsul nr.5 si 100

Answer 1

5 * 100 = 500
500 - 60 = 440
440 : 2 = 220
220 + 140 = 360
360 : 3 = 120 m latura patratului 
P = 4 * 120
P = 480 m

Answer 2

(lx3-140)x2+60=5x100
(lx3-140)x2+60=500
(lx3-140)x2=500-60
(lx3-140)x2=440
lx3-140=440:2
lx3-140=220
lx3=220+140
lx3=360
l=360:3
l=120
P=lx4=120x4=480