4x 9 - 26 = 2 x 9 - 8
! i am stumped

BIDMAS first

4 x 9 = 36

36 - 26 = 10

To double check we do the other side

2 x 9 = 18

18 - 8 = 10

10 = 10

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.