Question 33

Solve and find the value of y.
2x + y = 8, y-z = 3 and x + z = 5.

Solution

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We will add the 2nd and 3rd equation to get:
(y-z) + (x+z) = 3+5 ==> y + x = 8.
We subtract it from the 1st equation to get x = 0.
Substituting the value of x, we get y = 8.

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