The equation ax-3.5 = 5.7 has the same solution as 6x + 12.4 = 23.8, and the value of 2A + 90 is obtained

The equation ax-3.5 = 5.7 has the same solution as 6x + 12.4 = 23.8, and the value of 2A + 90 is obtained

About 99.6842105263158

The equation ax-3.8 = 5.7 and 6x + 12.4 = 23.8 have the same solution, and the value of 2A + 90 can be obtained

From 6x + 12.4 = 23.8
X=1.9
Let x = 1.9 A * 1.9-3.8 = 5.7
a=5
2a+90=2*5+90=100

Now there are 100 chickens and rabbits, with a total of 320 feet. How many chickens and rabbits do you have

Set up x rabbits
4x+2（100-x）=320
4x+200-2x=320
2x=120
x=60
Chicken: 100-60 = 40

At present, there are the same number of chickens and rabbits in the same cage. It is known that there are 28 more rabbit feet than chicken feet. Q: how many chickens and rabbits are there in the cage?

Suppose there are x chickens and rabbits, then according to the meaning of the question, we can get the equation: 4x-2x = 28, & nbsp; & nbsp; 2x = 28, & nbsp; & nbsp; & nbsp; & nbsp; X = 14, answer: there are 14 chickens and rabbits