Question

Urgent, am nevoie va rog!!! ​

Answer 1

Răspuns:

4x-8+5y=10

5x+15-2y=54

4x+5y=10+8

5x-2y=54-15

4x+5y=18 l×2

5x-2y=39 l×5

8x+10y=36

25x-10y =195

33x / =231

x= 231:33

x=7

4x+5y=18

4×7+5y=18

28+5y=18

5y=18-28

5y=-10

y=-10÷5

y= -2

Explicație pas cu pas:

4x-2+3y=-11

4x+3-9y=30

4x+3y= -11+2

4x-9y=30-3

4x+3y= -9 l×(-1)

4x-9y=27

-4x-3y=9

4x-9y=27

/ -12y =36

y=36: (-12)

y= -3

4x-9y=27

4x-9×(-3)=27

4x+27=27

4x=0