Question

Rezolvati in n:
C)7x-3=6x
D)5x-4=2x+2
E)5x-2+x=5x-1
Sa se rezolve in n:
A)x:5≤2
B)2(x+3)≤12
i)3(x+2)-5≤2x+7

Answer 1

7X-3=6X
7X-6X= 3
X=3 

5X-4=2X+2
5X-2X= 4+2
3X=6
X= 6:3
X=2 

5X-2+X=5X-1 
5X+X-5X= 2-1
6X-5X=1
X=1

X:5<2
0:5=0 <2

 si restu m-am plictisit :)) 

Answer 2

c) 7x - 6x = 3⇔ x = 3
d) 5x - 2x = 2 + 4 ⇔ 3x = 6⇔ x = 6/3⇔ x = 2
e) 6x  - 5x =2 - 1 ⇔ x = 1
a) x ≤ 2·5 ⇔ x≤ 10 ⇒ x∈ ( - 00, 10]
b) 2x + 6 ≤ 12 ⇔ 2x≤ 12 - 6 ⇔ 2x≤ 6 ⇔ x ≤ 6/2 ⇔ x≤ 3 ⇒ x∈ ( - 00, 3]
l) 3x + 6 - 5 ≤ 2x + 7 ⇔ 3x + 1 ≤ 2x + 7 ⇔ 3x - 2x ≤ 7 - 1 ⇔ x ≤ 6,
  x ∈ ( - 00, 6]