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(1) The opposite number of minus one and one-third is, the number of cube equals minus eight is. (2) (solve the problem with equation) a drives a car from a (1) The opposite number of minus one and one third is, and the number whose cube equals minus eight is (2) It takes two hours for a to drive from a to B, and three hours for B to ride a motorcycle from B to A. if B rides a motorcycle from B to a, after 0.5 hours, a drives from a to B, how many hours does a meet B? The second problem is solved by linear equation of one variable
-On the contrary, the number is one and one-third
The cube of two is minus eight
Let a meet B x hours after departure
1/3*0.5+(1/2+1/3)x=1
1/6+5/6x=1
5/6x=5/6
x=1
There is another way:
Let a's speed be a, B's speed be B, and a meet each other after X hours of departure
2a=3b
0.5B + X (a + b) = 2A, x = 1
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