Question

determinati x∈ Z :
a 2×(-x+5)=-8(3x+2)+56
b 2-10+3×|x|=-5
imi trebuie maine !

Answer 1

Răspuns:

Explicație pas cu pas:

a)

2×(-x+5)=-8(3x+2)+56

-2x + 10 = -24x - 16 + 56

24x - 2x = 56-10-16

22x = 30

x = 30/22 = 15/11 nu are solutii in Z

__________________

b 2-10+3×|x|=-5

-8 + 3×|x| = -5

3×|x| = -5 + 8 = 3

|x| = 3/3 = 1

x1 = 1

x2 = -1