Subtract the following :
$3 r + 2 t$ from $2 r - 3 t$

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Solution

$(2 r - 3 t) - (3 r + 2 t)$
$= 2 r - 2 t - 3 r - 2 t$
$= 2 r - 3 r - 2 t - 2 t$
$= (2 - 3) r + (- 2 - 2) t$
$= - r - 4 t$

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