Write an equation for the following story: sarah bought 4 puzzles for christmas presents for her friends. she also bought a book for her mom that cost $7. she spent a total of $23. how much did each puzzle cost?

1) Be the number of  puzzles 4x , the cost of a book waas  $7, for a total cost of $23. if  x is the cost of puzzles

then  4x+ 7 = 23⇒4x = 23-7⇒4x= 16⇒x= 16/4 = 4, it means that every puzzles cost $4

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