Question

Elimination method. 3x-y=7 ; x+4y=11​

Answer 1

Answer:

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Step-by-step explanation:

3$x$ − 7 = 7....(1)

$x$ + 4$y$ = 11....(2)

Multiply (1) by 4

12$x$ − 4$y$ = 28....(3)

$x$ + 4$y$ = 11....(2)

Add (3) and (2)

13 $x$ = 39

$x$ = 3

a − $y$ = 7

$y$ = 2