3 years ago

Twice a number,x, divided. y 6 is 42

Mathematics

1 answer:

Sonbull [250]3 years ago

5 0

x to the second power over 6=42. X=252

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Use the elimination method to solve the following system of equations.

aliya0001 [1]

The answer
2x - y + z = -3 (1)
2x + 2y + 3z = 2 (2)
3x - 3y - z = -4 (3)

 (1) - (2) 3y +2z =5
3 .(1) - 2.(2) 3y+5z = -1

let 's solve
3y +2z =5
3y+5z = -1
z= - 2, and 3y =5+4=9, y=3, so 2x - 3 -2 = -3 implies x= 1

finally x=1, y=3 and z= -2
proof
2x - y + z = -3?? 2.1 - 3 -2 = -3 (true)

3 0

3 years ago

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