Răspunsuri

2014-05-31T21:35:20+03:00
A) 9x -18 = -63
9x= -63 +18
9x= -45
x= -5

b)2x +2=6
2x=6-2
2x=4
x=2
2014-05-31T21:37:04+03:00
a) 9(x-2) = - 63 
⇒ 9x-18=-63⇒9x=-63+ 18 
⇒9x= - 36 ⇒ x = -45 : 9 
 x = -5 . 
b) 2(x+1) =6 
 2x+2 = 6 ⇒ 2x=6-2 
2x=4 ⇒ x = 4:2 
⇒ x = 2