i need help and thanks

A child's sorting game has 31 shapes. Each piece is either a triangle or a square. The shapes have a total of 111 sides. Build a system of equations that can be used to find how many of each shape is used in the game.

Question

i need help and thanks 

A child's sorting game has 31 shapes. Each piece is either a triangle or a square. The shapes have a total of 111 sides. Build a system of equations that can be used to find how many of each shape is used in the game.

solomonzelman · Answer

let t=number of triangles
let s=squares
SO,
$$t+s=31$$
3t   is the total number of sides all triangles
4s   is the total number of sides all squares
SO,
$$3t+4s=111$$

anonymous · Answer

yes thanks