How do you solve #3a + (2a - 5) = 13 - 2(a + 2 )#?
2 Answers
Mar 20, 2018
Explanation:
Mar 20, 2018
Explanation:
#"distribute parenthesis on both sides of the equation"#
#3a+2a-5=13-2a-4#
#"collect like terms on both sides"#
#rArr5a-5=9-2a#
#"add 2a to both sides"#
#5a+2a-5=9cancel(-2a)cancel(+2a)#
#rArr7a-5=9#
#"add 5 to both sides"#
#7acancel(-5)cancel(+5)=9+5#
#rArr7a=14#
#"divide both sides by 7"#
#(cancel(7) a)/cancel(7)=14/7#
#rArra=2#
#color(blue)"As a check"# Substitute this value into the equation and if both sides are equal then it is the solution.
#"left "=6+(-1)=6-1=5#
#"right "=13-2(4)=13-8=5#
#rArra=2" is the solution"#