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telo118 [61]
3 years ago
12

Find the solution to the system of equations. x + y + z = 25 y+z= 18 Z= 7

Mathematics
1 answer:
Umnica [9.8K]3 years ago
6 0

Answer:

x=7

y=11

z=7

Step-by-step explanation:

x + y + z = 25

y+z= 18

Z= 7

Substitute the third equation into the second

y+z=18

y+7 = 18

y = 18-7

y = 11

Now substitute y=11 and z=7 into the first

x +y+z = 25

x+11+7 = 25

x+18 = 25

x = 25-18

x=7

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