Question 315131
Elimination Method:

2x-4y=-4  ..(i)
4x+5y=48  ..(ii)

Multiplying (i) by 2 

4x-8y=-8  ..(i)
4x+5y=48  ..(ii)

subtracting (i) - (ii) we get

-13y=-56   
y=56 / 13



2x-4y=-4  ..(i)
4x+5y=48  ..(ii)

Multiplying (i) by 5 and (ii) by 4


10x-20y=-20  ..(i)
16x+20y=192  ..(ii)

Adding  (i) + (ii) we get

26x=172
x=172/26= 86/13

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Substitution Method:

*[invoke linear_substitution "x", "y", 2, -4, -4, 4, 5, 48]