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OpenStudy (anonymous):
solve the system of linear equations using any method. 2x+3y=47 7x-8y=-2 2x-y+3z=-19
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OpenStudy (mathstudent55):
Since the first two equations have both only x and y as variables, solve them as a system of equations for x and y. Then substitute the values you get for x and y into the third equation to get z.
OpenStudy (amoodarya):
OpenStudy (amoodarya):
put x=20 y=-18 in 3rd equation you have z=
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