This is only one equation. It is therefore not a system and you can not solve for two different variables y and z unless you have another equation to solve with. It.
I'm here buddy,
so, let's take the value of the two bags with equal weight as x.
= x + x + (x +
) = 
= 3x +
= 
= 3x =
- 
( let's take the LCM of 4 and 5 = 20
= 3x =
- 
= 3x = 
= x =
÷
=
×
= 
So, the weight of the equal bags are
and the weight of the third bag ( heavy one ) is
+
=
+
= 
1st bag =
kg
2nd bag =
kg
3rd bag =
kg
Hope it helps...
I need to answer two questions in order to ask a question. sorry that i’m stupid and have no idea how to do this
The point where the lines intersect is (0, 0)