Question

2. Completează tabelele: 2x x+3 2x-3 4 7 11 20 nic b a+b 2a-b 3 2 2 3 5 1 11 9​

Answer 1

Răspuns:

x=4

2x=2*4=8

x+3=4+3=7

2x-3=8-3=5

x=7

2x=2*7=14

x+3=7+3=10

2x-3=14-3=11

x=11

2x=11*2=22

x+3=11+3=14

2x-3=22-3=19

x=20

2x=2*20=40

x+3=20+3=23

2x-3=40-3=37

 

a=3,b=2

a+b=3+2=5

2a-b=2*3-5=6-5=1

a=2,b=3

a+b=2+3=5

2a-b=2*2-3=4-3=1

a=5,b=1

a+b=5+1=6

2a-b=2*5-1=6-1=5

a=11,b=9

a+b=11+9=20

2a-b=2*11-9=22-9=13