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

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Answer 1 · 2018-03-02T19:34:24

#a=15#

#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! :)

Answer 2 · 2018-03-02T19:36:58

#a=15#

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#