For this case we have to:
x: Variable that represents the points scored by Bev
y: Variable that represents the points scored by Ike
According to the data we have:
![x = 540\\x = y + 158](https://img.qammunity.org/2020/formulas/mathematics/middle-school/dn0r3n5nshh1rigb7n3gp7ittn7zmmqia5.png)
We substitute the first equation in the second one:
![540 = y + 158](https://img.qammunity.org/2020/formulas/mathematics/middle-school/n2vpdorp4ewgex6ooelx9t8xktbn6f6vp6.png)
We clear the variable "y":
![y = 540-158\\y = 382](https://img.qammunity.org/2020/formulas/mathematics/middle-school/zft1egmnr69pw8wuljugccqlm76qcztofb.png)
So, Ike scored 382 points.
Answer:
Ike scored 382 points.