Question

Determinati numerele naturale care verifica egalitatile

a) x+5273=5723

b) x-23542=42200

c) (x+200)/20=45

d) (320+x)/15=5100

e) 4x-1000/50-602/4=5

f) (3*x+5*x)/18=10

g) 15*(36*x-12*x)/120=3

h) 7*(15*x+35*x)/10+2*x=185

Answer 1

) x+5273=5723X=5723-5276=3
X=450

b) x-23542=42200X=42200+23542
X=65742

c) (x+200)/20=4520X+4000=45
X+200=45*20

X+200=900
X=900-200
X=700

d)(320+x)/15=5100320+X=5100*15
320+X=76500
X=76500-320
X=76180




e) 4x-1000/50-602/4=54X-20-602/4=5
16X-80-602=20
16X=20+80+602
16X=702
X=702:16
X=43,875


f) (3*x+5*x)/18=10
(3*x+5*x)=10*188X=180
X=180:18
X=10


g) 15*(36*x-12*x)/120=3
15*(36*x-12*x)=3*120
15*24*x=360360*X=360
X=360:360
X=1

h) 7*(15*x+35*x)/10+2*x=185

7*50*X/10+2*X=185
35*X+2*X=185
37*X=185
X=185:37
X=5,34