3x + 4y + 8z = 107

X=5 Y=7 Z=? SOLVE FOR Z
in Algebra 1 Answers by Level 1 User (280 points)

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2 Answers

Best answer

if x is 5, 3x must be 15. if y is 7, 4y must be 28. add them together and it's 43.

take away 43 from 107(that's 64)and divide itby 8

z=8

by Level 9 User (42.6k points)
selected by
3x+4y+8z=107

z=(107 -3x -4y)/8

x=5 & y=7...z=(107-15-28)/8

z=64/8

x=8
by

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