Question

How to answer this , and it’s not a test it’s for my reconnect class

Answer 1

From the given information, we know that z is equal to 3. Then, by substituting this value into the remaining equations, we have

x+y+3=14

and

y+4=7

From the last equation, we get

y=7-3

y=4

Now, by substituting this result into the first equation, we have

x+4+3=14

which gives

x+7=14

Then, by subtracting 7 to both sides, we have

x=7

Therefore, the solution of our systems is; X=7, y=4 and z=3. By comparing with the given options, the answer is option A.