Answer:
Step-by-step explanation:
hello : the system is : y =-5x+8...(*)
y =11/7x-4/7 ...(**)
by (*) and (**) : 11/7x-4/7 = -5x+8
multiply by 7 : 11x-4 = -35x+56
11x+35x = 56+4
46x = 60
x = 60/46 = 30/23
continu.....put the value for x in (*) or (**)
$26 dollars
Step-by-step explanation: when you divide 156 divided by 6 you get 26
30+(2x+7)+63=180(sum of angles of triangle )
30+2x+7+63=180
2x+100=180
2x=180-100
x=80/2
x=40
