Question

x-3y=6 and x-7y= -42 . solve by elimination method and find value of x and y.

Answer 1

Answer:

x=42;y=12.

Step-by-step explanation:

if we use elimination method;

we get; 6 + 3y = -42 + 7y

therefore; y = 12.

by substituting value of y; x = 42

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Answer 2

Answer:

x-3y =6................(1)

x-7y=-42..............(2)

Subtract the equation 1 from 2

x-7y = –42

x-3y = 6

(-) (-) (-)

-4y = -48

y=–48

‐4

y=12

substituting y value in eq 1

x-3y=6

x-3×12=6

x-36 = 6

x=6+36

x=43