To solve the equation 10x + 58 = 258, we first need to isolate the variable x.

Subtracting 58 from both sides gives us:

10x = 200

Dividing both sides by 10 gives:

x = 20

To find y, we first need to simplify the expression:

10 - 894 = -884

1356 + 198 = 1554

Therefore, y = -884 + 1554 = 670

So the solutions to the equations are:

x = 20
y = 670