Question

Rezolvati urmatoarele ecuatii:
a. x-3=-1, x € {-1,0,1,2,3}
b. 2x+7=3,x€{-1,0,1}
c.-3x+1=-5,x€{-2,-1,0,1,2,3}
d.2-2x=4,x€{-3,-2,-1}

Answer 1

Răspuns:

a) x-3=-1

x=-1+3=2

b) 2x+7=3

2x=3-7=-4

x=-4÷2=-2

c) -3x+1=-5

-3x=-5-1=-6

-3x=-6

x=2

d) 2-2x=4

-2x=4-2=2

x=-2÷2=-1