Algebra: A Combined Approach (4th Edition)

$F=357.2$ miles per hour $J=361$ miles per hour
F is the speed of the French TGV- J is the speed of the Japanese Maglev. $J=F+3.8$ $J+F=718.2$ $F+3.8+F=718.2$ $2F=714.4$ $F=357.2$ $J=357.2+3.8=361$