What had once happened to tommy teacher​

It depends on That story ...we don't even know the story How anyone can answer it

Explanation:

Tommy had virtual machines to teach him instead of physical human teachers. Tommy and Margie called the machines as Mechanical teachers. They had a screen which gives test and feedback to the students; they also stored lots of information, unlike the conventional textbook.

The machine had some technical issue and blanked out for unknown reasons. So it was taken away from him to be repaired. It took a month for the repair, and he did not have history classes for a month.

x=4, y=4

step-by-step explanation:

y=2x-4;

x+2y=12

we can use substitution since the first equation is solved for y

where ever you see y in the second equation, replace it with 2x-4

x + 2(2x-4) = 12

distribute the 2

x+4x-8 = 12

combine like terms

5x-8=12

add 8 to each side

5x-8+8=12+8

5x=20

divide by 5

5x/5 = 20/5

x =4

we still need to solve for y

y = 2x-4

we know x =4

y = 2(4) -4

y = 8-4

y=4

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