Question
If $x+y=2, y+z=5,$ and $x+y+z=10,$ then $y=?$F. -3G. 0H. 1J. 3K. $\frac{17}{3}$
Step 1
We can substitute the first equation into the third equation to get $2+z=10$. Show more…
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The Chain Rule
&10-3 x-2 y+z=2 \\ &x-3 y+2 z=1 \\ &2 x+y-3 z=-5 \end{aligned}
Programme F.5 Linear equations
Further problems F.5
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