A bag of crisps weighs 42g. Sam ate two thirds of the bag.
How many grams were left? Help please

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

cutt.ly/nz6VGda

I think the answer is 14 grams correct me if i'm wrong hope this helps :)

Step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18