Answer
$x=45$
Work Step by Step
$\frac{x}{3}+5=2x-70\longrightarrow$ vertical angles theorem
$\frac{x}{3}+75=2x\longrightarrow$ addition property of equality
$75=\frac{5}{3}x\longrightarrow$ subtraction property of equality
$(75)(\frac{3}{5})=(\frac{5}{3}x)(\frac{3}{5})\longrightarrow$ multiplication property of equality
$45=x$
