## Algebra 1

$2x=4$
Each side of the diagram represents one side of the equation. The bar separating the two sides represents the equal sign. The left side includes two green tiles. Each green tile represents a variable such as x, so 2 green tiles are 2x. The right side contains 4 yellow tiles. Each yellow tile represents +1, so 4 yellow tiles are +4. Combine the parts into an equation. $2x=4$