Question #15fe4

2 Answers
Sep 19, 2017

#n = 6#

Explanation:

Step one: collect like-terms

#7n+3=45#

7n + (2+1) = 45

Step two: : subtract both sides by 3

#7n = 42#

7n + 3 -3 = 45 *-3
7n =
*42

Step three : divide both sides by 7

Ans is #n = 6#

Sep 19, 2017

# n = 6 #

Explanation:

Combine like terms:
#7n + (2+1) = 45#
#7n + 3 = 45#

Isolate the variable:
#7n + 3 -3 = 45 -3#
#7n = 42#
#(7n)/7 = 42/7#

#n = 6#