–x – 7 = 16 please help me

asked Apr 9, 2018 66.2k views

3 votes

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3 votes

-x-7=16 |+7 , add to both sides
-x=23 |*(-1)
x = -23

Answer:
-23
,,,,,,,,,,,,,,,,,,,,
-x-7=-(-23)-7=23-7=16

Matthieu answered Apr 10, 2018

8.4k points

4 votes

Move the -7 to the right, its sign will flip (do you know why?)
Negate both sides to change -x to x

-x = 16+7
-x = 23
x = -23

Novol answered Apr 15, 2018

by Novol

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