Maddy7806
28.10.2019 •
Mathematics
Consider the equation 2(4x-5)=ax+b.from the list of digits provided, determine the values of a and b that make the solution to this equation x=3. (0 1 2 3 4) a=( ) b = ( ) the numbers in parentheses is u have to figure out which go in either a or b. ok
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Ответ:
a=4, b=2
Step-by-step explanation:
Filling in the given information (x=3), your equation becomes ...
2(4·3 -5) = a·3 +b
2·7 = 3a +b
3a +b = 14
At this point, there are several ways you can proceed. One of them is to subtract possible b values from 14, and see which result(s) give an appropriate a-value.
3a = 14 -b
3a = 14 -{0, 1, 2, 3, 4}
3a = {14, 13, 12, 11, 10}
a = (14/3, 13/3, 4, 11/3, 10/3}
The only viable choice among the numbers offered is ...
a = 4, b = 2
Ответ: