SOLUTION: ×=3 ×+y=9 2×-y+2z=18

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Question 1001791: ×=3
×+y=9
2×-y+2z=18
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

x=3.....eq.1
x%2By=9.....eq.2
2x-y%2B2z=18.....eq.3
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x%2By=9.....eq.2..........substitute 3 for x
3%2By=9
y=9-3
y=6

go to
2x-y%2B2z=18.....eq.3, substitute 3 for x and substitute 6 for y
2%2A3-6%2B2z=18
6-6%2B2z=18
2z=18
z=18%2F2
z=9