If #3a = 2.1# and #a+b=1.1#, what is the value of #b#?
1 Answer
Jun 15, 2017
Explanation:
#"the first step is to find the value of a"#
#"given " 3a=2.1#
#"divide both sides by 3"#
#(cancel(3) a)/cancel(3)=2.1/3#
#rArra=0.7#
#"now " a+b=1.1#
#rArr0.7+b=1.1#
#"subtract 0.7 from both sides"#
#cancel(0.7)cancel(-0.7)+b=1.1-0.7#
#rArrb=0.4#
