## Algebra 1

$x=4$
Each side of the diagram represents one side of the equation. The bar separating the two sides represents the equal sign. The left side of the equation is $x+1$. - A green tile represents a variable such as x. The left side of the diagram will include one green tile since the implied coefficient of x is 1. - The left side will also include 1 yellow tile. Each yellow tile represents +1, so adding 1 is represented by 1 yellow tile. The right side of the equation is "5". - A yellow tile represents +1, so 5 is represented by 5 yellow tiles. Use the addition property of equality to add 1 red tile on both sides of the line. Remove the zero pairs. $x+1=5\longrightarrow$ subtract 1 from both sides $x+1-1=5-1\longrightarrow$ subtract $x=4$