How do you evaluate #4a - 3a - a + a + 3a = 20#?

3 Answers
Jan 11, 2018

Answer:

#a=5#

Explanation:

#"simplify the left side by collecting like terms"#

#rArr4a=20#

#"divide both sides by 4"#

#(cancel(4) a)/cancel(4)=20/4#

#rArra=5" is the solution"#

Jan 11, 2018

Answer:

#a=5#

Explanation:

#4a-3a-a+a+3a=20#

You have #a# common in every term:

#a(4-3-1+1+3)=20#

Do the operations and you are left with

#4a=20#

#a=20/4#

#a=5#

Jan 11, 2018

Answer:

#a=5#

Explanation:

#4a-3a-a+a+3a=20#

First bring all the positive terms together and negative terms together

#4a+a+3a-3a-a=20#

Now all the terms are like terms, so add them keeping the sign same

#8a-4a=20#

Now subtract the terms

#4a=20#

Now divide the equation by #4# on both sides. We get,

#a=5#

Hope it helped you!