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1.Efectuati in 2 moduri.
a. 2a+3a=
b.6x+x=
c.3a+5a=
d.4x-x=
e.2x+6x=
f.10x-10x=
g.9x-2x=
h.x+x=

2. Daca x+y=15
Atunci detrminati valuarea lui n in cazurilor urmatoare:
a. n=x+2y+z
b. n=3x+5y+2z
c. n-4x+7y+3z

Răspuns :

VesnIana
1.
a.(2+3)×a=5a
b.(6+1)×x=7x
c.(3+5)×a=8a
d.(4-1)×x=3x
e.(2+6)×x=8x
f.(10-10)×x=x
g.(9-2)×x=7x
h.(1+1)×x=2x

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