Question

x-3y = 8
4x - y = 21
​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$x - 3y = 8$

$4x - y = 21$

Using Substitution Method,

We get

$x = 8 + 3y$

Substituting this value of x in the 2nd Equation,

We get

$4(8 + 3y) - y = 21$

$32 + 12y - y = 21$

$32 + 11y = 21$

$11y = 21 - 32$

$11y = - 11$

Therefore,

$y = - 1$

Using the value of y in the first equation,

we get

$x - 3( - 1) = 8$

$x + 3 = 8$

$x = 8 - 3 = 5$

Therefore we get our answer as

y = - 1 and x = 5.

Hope this helped you.