According to the meaning of the question, there are twice as many cars as buses.
Suppose there are x buses and 2X cars.
There are 27 cars and buses.
X+2X=27。
Solution: X=9, then 2X= 18.
So there are 9 buses, 18 cars.
Extended data:
This kind of problem belongs to the problem of sum times.
Sum and multiple problem formula:
Sum of two numbers and number of copies = decimal.
Decimal × multiple = large number
Sum of two numbers-decimal = large number
You can also use the solution of one-dimensional linear equations.
There are five steps to solve a linear equation with one variable, namely, denominating, removing brackets, shifting terms, merging similar terms, and the transformation coefficient is 1. All steps are carried out according to the properties of algebraic expressions and equations.
To solve this equation
For example:
If you remove the denominator, you will get:
Without parentheses, you get:
To move an item, you must:
Merge similar items, get: (usually abbreviated as "merge, get:")
The coefficient becomes 1, and we get: