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Aflati numarul natural x din proportiile:

Aflati Numarul Natural X Din Proportiile class=

Răspuns :

b) (x+5)×6=11x
6x+30=11x
11x-6x=30
5x=30
x=6

c) x×10=(x+4)×5
10x=5x+20
10x-5x=20
5x=20
x=4

d) (2x-1)×6=5×(x+3)
12x-6=5x+15
12x-5x=15+6
7x=21
x=3

e) (2x+4)×2=(5x-1)×3
4x+8=15x-3
4x-15x=-3-8
-11x=-11
x=1