How do you solve #2m-17=21#?

1 Answer
Jim G.
Jan 29, 2017

#m=19#

Explanation:

Isolate 2m by adding 17 to both sides of the equation.

#2mcancel(-17)cancel(+17)=21+17#

#rArr2m=38#

To solve for m, divide both sides by 2

#(cancel(2) m)/cancel(2)=38/2#

#rArrm=19#

#color(blue)"As a check"#

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

#m=19to(2xx19)-17=38-17=21=" right side"#

#rArrm=19" is the solution"#

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