Question

doar pe n,o,p,q,r


Va rog frumos ,dau coronita !!!!!!!! Repede

Answer 1

n) (n-5)×3=21
3n-15=21
3n=21+15
3n=36
n=36:3=12

o) (24-21)×5×2:o=3
3×5×2:o=3
15×2:o=3
30:o=3
o=30:3=10

p) (p-4+200)×5=32000+30
p-4+200×5=32030
p-4+1000=32030
p-4=32030-1000
p-4=31030
p=31030+4=31034

q) 923-q=693-145
923-q=548
q=923-548
q=375

Answer 2

n)(n-45:9)×3=2185-2164
(n-5)×3=21
(n-5)=21:3
n-5=7
n=5+7
n=12


o)(24-7×3)×5×2:o=30:10
(24-21)×5×2:o=3
3×5×2:o=3
15×2:o=3
30:o=3
o=30:3
o=10

p)(p-28:7+200)×5=32 000+3×10
(p-4+200)×5=32 000+30
(p-4+200)×5=32 030
p-4+200=32 030:5
p-4+200=6406
p-4=6404-200
p-4=6204
p=6204+4
p=6208


q)923-q+145=693
923-q=693-145
923-q=548
q=923-548
q=375


r)r×r+648=7×100+2×10+3×3
r×r+648=700+20+9
r×r+648=729
r×r=729-648
r×r=81
r=9