Question

Date
1 Use elemination method to solve
4x +12y = 120
x + y = 16

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Answer 1

Answer:

X=9,Y=7

Step-by-step explanation:

4x +12y = 120

( multiple by 4) 4 x + 4y = 64

(-). (-). (-)

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(+)8y=(+)56

8y=56

y=56/8

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'y=7 '

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sub y=7 in equation (1)

4x+12(7)=120

4x+84=120

4x=120-84

4x=36

x=36/4

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x=9

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