Question

Ma ajuta cineva vă rog!​

Answer 1

Răspuns:

a 3x-12=2x

3x-2x=12

x=12

S={12}

b x×x-9x+20=0

x×x-9x=-20

x(x-9)=-20

x-9=-20÷x

x×x=-20+9

x×x=-11

c 2x+3=5

2x=5-3

2x=2

x=1

d 2x-5<11

Nu stiu

e x-1/2=3

x-1=2×3

x-1=6

x=7

sper ca te ajut