Find the value of the variable such that: the value of 5−a is 20 greater than the value of 6a−1pls quick

The question is an illustration of equivalent expressions.

The value of a for the given condition is -2

From the question, we have:

5 - a is 20 greater than 6a - 1

This means that:

Collect like terms

Divide both sides by 7

Hence, the value of a is -2

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The desired value will be the solution to the equation ...

... (5 - a) = 20 + (6a - 1)

... 5 - a = 19 + 6a . . . collect terms

... 5 = 19 + 7a . . . . . . add a

... -14 = 7a . . . . . . . . . subtract 19

... -2 = a . . . . . . . . . . . divide by the coefficient of x

The value of the variable is -2.

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.