3. Solve the following pair of linear equations using a method of your

1.	3. Solve the following pair of linear equations using a method of your choice20x + 80y = 180 and 80x + 20y = 120
Answer» ANSWER: X=10; y=2 Step-by-step explanation: x=180-80y/20 put this VALUE of x in SECOND eq. 80×180-80y/20+20y=120 after solving it we get 720-320y+ 20y=120 720-300y=120 -300y=120-720 -300y=-600 y=-600÷ -300 y=2 put the value of y in any of these equations after solving you will find x=10

3. Solve the following pair of linear equations using a method of your choice20x + 80y = 180 and 80x + 20y = 120

Answer»

ANSWER:

X=10; y=2

Step-by-step explanation:

x=180-80y/20

put this VALUE of x in SECOND eq.

80×180-80y/20+20y=120

after solving it we get

720-320y+ 20y=120

720-300y=120

-300y=120-720

-300y=-600

y=-600÷ -300

y=2

put the value of y in any of these equations

after solving you will find

x=10

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3. Solve the following pair of linear equations using a method of your choice20x + 80y = 180 and 80x + 20y = 120​

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3. Solve the following pair of linear equations using a method of your choice20x + 80y = 180 and 80x + 20y = 120