coolblue101
coolblue101
13-04-2017
Mathematics
contestada
need help pls solve 7x-4y=-7 5x+y=22
Respuesta :
Аноним
Аноним
13-04-2017
7x-4y=-7
5x+y=22
multiply 4 on the 2nd equation
20x+ 4y=88
now you have
7x -4y = -7
20x + 4y = 88
--------------------add
27x = 81
x = 3
7x-4y=-7
7(3)-4y=-7
-4y = -28
y = 7
answer (3, 7) is the solution
Answer Link
ethanpace69
ethanpace69
13-04-2017
i think this would be the correct answer
{x,y} = {3,7}
Answer Link
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