Question

determinati numerele naturale care verifica egalitatile:
a 4x-1000:50-620:4=5
b (3*x+5*x):8=10
c 15*(36*x-12*x):120=3
d 7*(15*x+35*x):10+2*x=185

Answer 1

a) 4x-1000:50-620:4=5
  4x-20-155=5
4x-20=5+155
4x-20=160
4x=160+20
4x=180
x=180:4
x=45

b) (3*x+5*x) :8=10
(3+5)x=10*8
8x=80
x=80:8
x=10

c) 15*(36*x-12*x):120=3
15*(36*x-12*x)=120*3
15*(36*x-12*x)=360
(36-12)x=360:15
24x=24
x=24:24
x=1

d) Pe asta nu o stiu, scuze!