Math

3x+3z=54 2x + 8z = 78

Asked by AnneS2 on 24 Apr 03:51

Last updated by anonymous on 26 Apr 00:42

1 Answers

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Answered by CherieS on 26 Apr 00:42

3x+3z=54

3x+3z-3z=54-3z

3x=54-3z

3x/3=54-3z/3

x=18-z

2x + 8z = 78

2(18-z)+8z=78

36-2z+8z=78

36+6z=78

36-36+6z=78-36

6z=42

6z/6=42/6

z=7

x=18-z

x=18-7

x=11