Question

21 Rezolvați următoarele ecuații: (va rogggg multtt) ​

Answer 1

Răspuns:

a.3(2x-4)=7(2-x)

6x-12=14-7x

6x+ 7x=14+12

13x=26

x=2

b. 4(2x+5)=3(x+5)

8x+20=3x-15

8x-3x=-15-20

5x=-35

x=-7

c.2+2x-5=4x

-3+2x=4x

2x-4x=3

-2x=3

x=-3/2

D. 2(7x-5)-3(4x+1) =0

14x-10-12x-3=0

2x-13=0

2x=13

X=13/2

E. 4+3x-2=2(2x+5)

2+3x=4x+10

3x-4x=10-2

-x=8

X=8

F. 5x-7-2(x-1)=4(11-x)

5x-7-2x+2=44-4x

3x-5=44-4x

3x+4x=44+5

7x=49

X=7

G. 2x-(3-x)=5(x+3)

2x-3+x=5x+15

3x-3=5x+15

3x-5x=15+3

-2x=18

X=-9

H. 4x-6=3(x+1)-2x

4x-6=3x+3-2x

4x-6=x+3

4x-x=3+6

3x=9

X=3