Can someone help me pls

so you're doing measurements and kilograms so basically if you add the 14 for the 40 but now equals 68 and if you had 10 + 39 l equal 5 and then you want to equal it to 12 / 13 equal what is it equal you know what it equals but you just want to add it up just to get a look a little bit contrasty invocation though inspirational but yeah you want to do all those things

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation:

attach the statements so i can answer : )