Some forces require objects to be touching each other, but others can act at a distance. Which of these forces always requires objects to be touching each other?
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Ответ:
2x + 3y – z = 1 (1)3x + y + 2z = 1 (2)2x + 2y – 3z = –5 (3)Multiply equation (1) by 24x+6y-2z=2 3x + y + 2z = 1 (2)Add:7x+7y = 3 (4)Multiply equation (1) by -3-6x-9y+3z = -32x + 2y- 3z = –5 (3)Add:-4x-7y=-8 ---(5)Solve equations (4) and (5)7x+7y = 3 (4)-4x-7y=-8 ---(5)Add:3x= -5x=-5/3