Math

2y+5z=64 y + 7z = 68

Asked by AnneS2 on 24 Apr 03:46

Last updated by anonymous on 28 Apr 00:36

1 Answers

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Answered by CherieS on 28 Apr 00:36

2y+5z=64 y + 7z = 68

y+7z=68

y+7z-7z=68

y=68-7z

2y+5z=64

2(68-7z)+5z=64

(2)(68) -(2)(7z)+5z=64

136-14z+5z=64

136-9z=64

136-136-9z=64-136

-9z=-72

-9z/-9=-72/-9

z=8

y=68-7z

y=86-7(8)

y=68-56

y=12