<PRE><B>Question 108222</B>

{{{-8-9t=21t-17}}} Start with the given equation




{{{-9t=21t-17+8}}}Add 8 to both sides



{{{-9t-21t=-17+8}}} Subtract 21t from both sides



{{{-30t=-17+8}}} Combine like terms on the left side



{{{-30t=-9}}} Combine like terms on the right side



{{{t=(-9)/(-30)}}} Divide both sides by -30 to isolate t




{{{t=3/10}}} Reduce


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Answer:

So our answer is {{{t=3/10}}}  (which is approximately {{{t=0.3}}} in decimal form)

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