Question

15x + 31y = -3 X= -y +3

Answer 1

Step-by-step explanation:

x+y=3

x=3-y

15 (3-y)+31y =-3

45-y+31y=-3

-y+31y =-3-45

30y÷30=-48÷30

y=-1,6

x+y=3

x+-1,6=3

x-1,6=3

x=3+1,6

x=4,6