Question

Rezolvati ecuatiile in multimea A={ 0; 1/2 ; 1.1; 5; 2 } ecuatiile :
a) 2,5x = 0
b) 3x - 1 = 2
c) 4x + 3 = 7
d) x : 3 = 2/3
e) 2x - 1 pe 4 = 2 * 1/4 ( 2 intregi si 1 pe 4 )
f) 2x + 1 = 5

Answer 1

a)2,5x=0
x=0:2,5
x=0

b)3x-1=2
3x=2+1
3x=3
×=3÷3
×=1

c)4x+3=7
4x=7-3
4x=4
x=4÷4
x=1

d)x÷3=2/3
×÷3=0,66
x=0,66×3
x=1,98

f)2x+1=5
2x=5-1
2x=4
x=4÷2
x=2