Question

VA ROG! Dau 50 de puncte!​

Answer 1

Răspuns:

a) 3x+7=-2x-8

3x+2x= -8-7

x= -15

b) 6x-2=4x+5

6x-4x=5+2

x=7/2=>x=3,5

c) 2x+14=12-3x-8

2x+3x=4-14

5x=-10

x=-10/5=>x= -2

d) 2+3x+12=x+5x-25

14+25=6x-3x

x=39/3=>x=13

e) 9x-1/7=(10/14)⁽²+4x

⁷⁾9x-1/7=5/7+⁷⁾4x

63x-1=5+28x

63x-28x=5+1

x=6/35

f) (²⁾2/3-³⁾1/2)x=-1

(4/6-3/6)x=-1

x/6=-1=>x=-6

g) ¹⁰⁾125x/100-¹²⁵⁾1/8= - 225/1000

1250x-125= -225

1250x= -225+125

x= -100/1250=> - 0,08

h) 6(x-1/2)=8

⁶⁾x-³⁾1/2=8/6

6x-3=8

6x=8+3=>x=11/6

i) ³⁾x/2+⁶⁾1+²⁾x/3=⁶⁾8

3x+6+2x=48

5x=48-6

x=42/5=>x=8,4

j) 5-(x-1/2)=15

x-1/2=5-15

²⁾x-1/2= -²⁾10

2x-1=-20

2x=-20+1

x= -19/2=>x= -9,5