Question 116204
I'll do the first two to get you started:


#1




{{{-1=(-4/7)t}}} Start with the given equation




{{{(7)(-1)=(7)((-4/7)t)}}} Multiply both sides by 7. 


{{{-7=-4t}}} Multiply 




{{{0=-4t+7}}}Add 7 to both sides



{{{+4t=+7}}} Add 4t to both sides



{{{t=(7)/(4)}}} Divide both sides by 4 to isolate t



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Answer:

So our answer is {{{t=7/4}}}  (which is approximately {{{t=1.75}}} in decimal form)


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#2




{{{(-3/8)w=-9}}} Start with the given equation




{{{(8)((-3/8)w)=(8)(-9)}}} Multiply both sides by 8. 


{{{-3w=-72}}} Multiply




{{{w=(-72)/(-3)}}} Divide both sides by -3 to isolate w




{{{w=24}}} Divide


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Answer:

So our answer is {{{w=24}}}