Question

Rezolvati urmatoarele ecuatii,unde x ∈ R:
c) x-1supra3=7supra 3
d) 7supra5-x=1 3supra 5
f)5supra 8-x=3 1supra 8

Answer 1

C) x-1/3=7/3

3(x-1)=3x7

3x-3=21

3x=21+3

3x=24

X=24:3=8

D) 7/5-x=1 3/5

7-5x/5=8/5

5(7-5x)=5x8

35-25x=40

-25x=5

X=5/-25=-1/5=-0,2

F) 5/8-x=3 1/8

5-8x/8=25/8

8(5-8x)=8x25

40-64x=200

64x=200-40

64x=160

X=160:64= 2,5