Question

17x + 36y = 479
Y= 2x - 4

Answer 1

17x+36(2x-4)=479
17x+72-144=479
17x+72x=335
89x=335
x=3.76

Answer 2

X=7

Y=10

Explanation:

Replace expression Y=2x-4 in 17x + 36y = 479

• 17x+36(2x-4)=479
• 17x+72x-144=479
• 89x-144=479
• 89x=479+144
• 89x=623

• x=
  `(623)/(89)`

• x=7

Now, replace X=7 in expression Y=2x-4

• Y=2(7)-4
• Y=10