How do you solve #-98= - 7x - 8( 1+ x )#?

1 Answer
toolemony · EZ as pi
Jun 18, 2017

x = 6

Explanation:

First, write out the problem.

#-98 = -7x - 8( 1 + x )#

Before you do anything else, make the subtraction signs addition signs, followed by a subtraction symbol.
Then, use the distributive property and multiply:

#-8 xx 1, and -8 xx x#.

After all that, it should looks like this:

#-98 = -7x + (-8) + (-8x)#

Then, combine like terms #-7x and -8x#, giving you the following:

#-98 = -15x + (-8)#

Now, you add eight to both sides #(-98 and -8)#.

You will now have this:

#-90 = -15x#

Finally, divide #-90 and -15# by# -15#, and you will end up with:

# 6 = x#, or

#x = 6. #

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