Answer:
the first one
Step-by-step explanation:
because x has an coefficient
450/30
15
15/3x =5
x= 5
5+2y= 315
5-5+2y =315-5
2y = 310
2y/2 = 310/2
y=155
450/45
10
2x+4y=450
2×5=10
10+(4×155)
=620/155
=4
10/5=2
oy=logo 6
