Question

Rezolvati in Q ecuatiile
a) 5-x=9
b) ⅖x-2 = x - 4/10
c) x+7=5
d) 2x+1= -15

Answer 1

Raspuns:

Explicație pas cu pas:

Answer 2

Răspuns:

5-x=9

-x=9-5

x=-4

_______

2x/5-2=x-4/10 aducem la acelasi numitor care este 10

4x-20=10x-4

4x-10x=-4+20

-6x=16

x=-16/6=-8/3

_________

x+7=5

x=5-7

x=-2

________

2x+1=-15

2x=-15-1

x=-16:2

x=-8