How do you solve #2a + 4= - 8- 4a#?

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Answer 1 · 2016-10-17T01:30:04

Separate and move the variables to one side of the equal sign and the other numbers to the opposite side.

#a = -2#

#2a + 4 = - 8 - 4a" "# Adding 4a to both sides becomes

#6a + 4 = - 8#

It's a negative #4a# and you need a positive to cancel a negative.

Then subtract 4 from both sides so the equation then changes to

#6a = - 12#

Finally, you divide both sides by 6 to isolate #a#

The answer is # a = - 2 #