Question

1)
Rezolvați ecuațiile:
a)4x-1=7x+14
b)3-4•(3x-2)=2•(5x-3)
c) (5x-3) la a doua =9
DAU COROANĂĂĂĂĂĂĂ​

Answer 1

a. 4x-1=7x+14 /+1

4x=7x+15 /-4x

0=3x+15

3x=-15

x=-5

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

3-12x+8=10x-6

11-12x=10x-6 /+6

17-12x=10x /+12x

17= 22x

x=17:22

c. (5x-3)^2=9

cazul 1

(-3)^2=9

rezulta

5x-3=-3

5x=0

x=0

cazul 2

(3)^2=9

rezulta

5x-3=3

5x=6

x=6:5