3 years ago

Use the matrix to solve the system of equations 5x-4y=28 7x+5y=18

Mathematics

1 answer:

KatRina [158]3 years ago

3 0

Okay so I wont be able to show the row here but I will try my best.

7(5x-4y=28) = 35x-28y=196

-5(7x+5y=18) = -35x-25y=-90

= -53y=106

= y=-2

5x-4(-2) =28

5x+8=28

5x=20

x=4

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