Question

ajutor rapid îmi trebuie​

Answer 1

a. 2*3 + 3*y = -6

6 + 3y = -6

3y = -6-6

3y = -12

y = -4

b. 4x-(2x-1) = 12

4x-2x+1 = 12

2x+1 = 12

2x = 11

x = 11/2

c. 2x = 8-y ⇒ x = (8-y)/2

2(8-y)/2+3y = 0

8-y+3y = 0

2y = -8

y = -4

deci x = (8+4)/2

x = 12/2

x = 6

d. 2x +3y = 5

   4x - 3y = -4

   ---------------- (+) aplic metoda reducerii

     6x  /   = 1

x = 1/6

2*1/6 + 3y = 5

3+3y = 5

3y = 2

y = 2/3