Use a software program or graphing utility to solve the system of linear equations. $($If there is no solution, enter NO SOLUTION. If the system has an infinite number of solutions, set $x_3=t$ and solve for $x_1$ and $x_2$ in terms of $t.)$

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$18.[-/2$ Points$]$

LARLINALG$81\mathrm{.}1\mathrm{.}067.$

One eight$-$ounce glass of apple juice and one eight$-$ounce glass of orange juice contain a total of $241$ milligrams of vitamin C$.$ Two eight$-$ounce glasses of apple juice and three eight$-$ounce glasses of orange juice contain a total of $604$ milligrams of vitamin $C.$ How much vitamin C is in an eight$-$ounce glass of each type of juice?

apple juice

$mg$

orange juice $mg$

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$19.[0/2$ Points$]$ LARLINALG$81\mathrm{.}1\mathrm{.}068.$MI$.$

Two planes start from Los Angeles International Airport and fly in opposite directions. The second plane starts $\frac{1}{2}$ hour after the first plane, but its speed is $60$ kilometers per hour faster. Two hours after the first plane departs, the planes are $3065$ kilometers apart. Find the airspeed of each plane.

first plane $$ kilometers per hour

second plane $$ kilometers per hour

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