Let x people produce parts a and y people produce parts b.
Then: x+y = 62; 12x/23y=3/2
Substitute x=69/24y in formula 2 into formula 1 and y= 16, so x=46.
2)
The profit from selling 1 product is 4-2.3-4* 10%= 1.3 yuan, and the profit from producing 20W pieces a year is 26W yuan.
The first year's loan is 40W, which will be repaid at the end of the year, with a profit of 260,000, which is not enough;
At the end of the second year, 46 * (1+15%) = 529,000 yuan, and the second profit was 520,000 yuan, which is not enough.
You can pay it off in the third year.
3)
3000*( 1+5%)=3 150
(4500-3 150)/4500=30%
(4500-3000)/4500=33.3%
95%- never fully understood the meaning of the topic.
4)
It takes x, y and z days to produce a, b and c parts respectively.
Then x+y+z=63.
300x=500y=600z
According to Equation 2, Y=3/5x and z= 1/2x.
Substituting 1 gives x=30, so Y= 18 and z= 15.
5) Simplify the equation and get 2x=3-4m.
Therefore, if x is a positive integer, we can assume that x= 1, 2, 3 in turn, and get different m.
If x < =2, 2x
6)
|x-2| >=0,(3x-y+m)^2>; =0
So | x-2 | = 0, (3x-y+m) 2 = 0.
So x=2, so 6+m-y=0.
If y & gt=0, then 6+m > =0, that is, m>= -6.
If y < -2, then 6+m.