17. Because 7 plus 4 equals 11 and if you add 6 you get 17
I think you could times 4 and 5 to get 20
Answer:
9-63x
Step-by-step explanation:
9(1-7x)
9-63x
Answer:
15
Step-by-step explanation:
x - y = 10, then x = 10 + y
x + y = 20
substitute for x:
10 + y + y = 20
2y = 10
y = 5
x = 10 + 5 = 15