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# Solving an Equation by Substitution

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v=ab/(c+d)
where v = velocity
where a = 6.67*10^-11 N m^2 kg^-2
where b = 5.97*10^24kg
where c = 6.37*10^3km
where d = 385km

could you show all workings and all terms in the equation should be in SI units

##### Solution Summary

An equation is solved by substituting values for variables.

##### Solution Preview

First transform km into meters....1 km = 1000 m

c = 6370 km x ...

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• BSc, University of Bucharest
• MSc, Ovidius
• MSc, Stony Brook
• PhD (IP), Stony Brook
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