marten9876 marten9876

29-04-2015
Mathematics

Answered

Solve the system of equations by elimination.

2x+8y=10

-4x-9y=-13

x = y =

Answer :

apologiabiology apologiabiology

29-04-2015

so use cancelation
multiply first equation by 2
2x+8y=10
times 2
4x+16y=20
now add

4x+16y=20
-4x-9y=-13 +
0x+7y=7
7y=7
divide by 7
y=1

subsittue

2x+8y=10
2x+8(1)=10
2x+8=10
subtract 8 from both sides
2x=2
divide by 2
x=1

x=1
y=1

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