Question 160023
{{{D/(-3)+7=10}}}
Subtract 7 from both sides.
{{{D/(-3)+cross(7-7)=10-7}}}
{{{D/(-3)=3}}}
Multiply both sides by (-3).
{{{cross(-3)*(D/cross((-3)))=(-3)*3}}}
{{{D=-9}}}
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Check your answer.
{{{D/(-3)+7=10}}}
{{{(-9)/(-3)+7=10}}}
{{{3+7=10}}}
{{{10=10}}}
Your answer led to a true statement.
It's a good answer.