Question

Rezolvatii in Z ecuatiile
a) -4x+1=-15
b)5x-3=3x+11
c)5(x-1)=2x+7
d)3(2x-5)=6(x-1)-9

Answer 1

Răspuns:

a) -4x+1=-15

-4x=-15-1

-4x=-16 /:-4

x=4

b) 5x-3=3x+11

5x-3x=11+3

2x=14

x=7

c) 5(x-1)=2x+7

5x-5=2x+7

5x-2x=7+5

3x=12

x=4

d) 3(2x-5)=6(x-1)-9

6x-15=6x-6-9

-15=-6-9

-15=-15

x⊂R