What is the value of a in the equation 5a – 10b = 45, when b = 3?

2 Answers
Mar 2, 2018

Answer:

#a=15#

Explanation:

#5a – 10b = 45#

When b=3, [By transposing method]

#5a–(10xx3) = 45#

#5a- 30=45#

#5a = 45+30#

#5a = 75#

#a=75/5#

#a=15#

~Hope this helps! :)

Mar 2, 2018

Answer:

#a=15#

Explanation:

Just put #10# instead of #b# in the equation to get:

#5a-(10.3)=45#

#5a-30=45 #

Then add #30# to both sides

#5a=75#

Then divide both sides by #5#

#a=15#