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20-11-2017
Mathematics

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What is the solution of this linear system?{X+Y=13 1/2x+y=10

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dannielle dannielle

20-11-2017

x +y=13
1/2*x+y=10 |-1

x +y=13
-1/2*x-y=- 10 } +

x-1/2*x=13-10
1/2*x=3
x=3*2
x=6

6+y=13
y=13-6
y=7
The solution is : (6,7)

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