Question

Vă rog cât mai repede cele doua exerciții, dau coroană! ​

Answer 1

a)3x+4y=6(5)

2x-5y=-19.

15x+20y=30

8x-20y=-76

23x=-46

x=-2

y=3*(-2)+4y=6

-6+4y=6

4y=6+6

4y=12

y=3

d)2x+5y=-13(-12)

7x+12y=-18(5)

24x-60y=156

35x+6y=-90

-11x=66

x=-6

y=2*(-6)+5y=-13

-12+5y=-13

5y=-13+12

5y=-1

y=-0,2