How do you solve #-\frac { 2u } { 3} = 10#?

1 Answer
Jim G.
Apr 17, 2017

#u=-15#

Explanation:

To eliminate the fraction, multiply both sides of the equation by 3, the denominator of the fraction.

#cancel(3)^1xx-(2u)/cancel(3)^1=3xx10#

#rArr-2u=30larrcolor(red)" no fractions"#

#"divide both sides by -2"#

#(cancel(-2) u)/cancel(-2)=30/(-2)#

#rArru=-15#

#color(blue)"As a check"#

Substitute this value into the left side of the equation and if equal to the right side then it is the solution.

#-(2xx-15)/3=-(-30)/3=30/3=10=" right side"#

#rArru=-15" is the solution"#

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