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kogti [31]
3 years ago
8

PLEASE HELP ASAP #12!!!

Mathematics
2 answers:
Brums [2.3K]3 years ago
7 0
All you have to do is add up all of the sides.
then once you have X, for part 2 all you need to do is replace X with 4 and then solve
Helen [10]3 years ago
4 0
Just substitute 4 for the x value.
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Step-by-step explanation:

z = m - x       add x to both sides

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z + x = m            subtract z from both sides

z - z + x = m - z

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