Question

Stabiliti daca x = -2 este solutie a urmatoarelor ecuatii:
a) 2x + 2 =
-2
6)-3x+7=
-5
c)2x = 0
d) -4x + 4 =
-8
e) - 5x + 10 = -15

Answer 1

Răspuns:

a)2x+2=-2

2x=-4

x=-2

S={-2} A

b)-3x+7=-5

-3x=-12

x=4

S={4} F

c)2x=0

x=0

S={0} F

d)-4x+4=-8

-4x=-12

x=3

S={3} F

e)-5x+10=-15

-5x=-25

x=5

S={5} F