## Elementary Technical Mathematics

$5x-2y=46$ $x=5y$ Substitute 5y for x in the first equation. $5(5y)-2y=46$ $\longrightarrow$ simplify $25y-2y=46$ $\longrightarrow$ simplify $23y=46$ $\longrightarrow$ divide both sides by 23 $23y\div23=46\div23$ $\longrightarrow$ simplify $y=2$ Substitute 2 for y in the second equation. $x=5(2)$ $\longrightarrow$ simplify $x=10$