Question

Să se afle x............​

Answer 1

Răspuns:

a). (x+4)×3=5x. 5x-3x=12. 2x=12. x=6

b). 10x-10=3. 10x=13. x=13/10

c)100x+200=25x. 75x=-200. x=-8/3

d). 75×8×2=40x. 30=40x. x=3/4

e).115/25=(10x+45)/(10x-45)=100x^2-45^2

23/5+45^2=100x^2

=100x^2

x=√(2025+23/5)/10

f). x/3=10/3-5x/3. 6x=10 x=5/3