At first, she had +2y in the upper and -5y in the lower.
She multiplied the upper by 5 . Then she had +10y in the upper.
She should multiply the lower by 2 . Then she'll have -10y
there. She'll be able to add the two equations, and the 'y's will
go away. She'll be left with a single equation with only 'x' in it,
and she can solve that one for the value of 'x'.
Answer:
after the collision cart 1 will stop and cart 2 will keep moving will 0.1.m/s after stop.
4 1/2 = 9/2
1 5/7 = 12/7
9/2 / 12/7 = 21/8 = 2.625
I think it's one of the last 2 they equal the same thing, so -8+(-3) is the answer.
You subtract 1.1 each time so the answer is 6.6 (a)
