Can someone explain this to me my teacher did not explain how to do these problems well.

64.8cm = x + y

The maximum sleeve length, x, plus the maximum allowable deviation, y, is 62.2cm = x - y

Step-by-step explanation:

The minimum sleeve length is the ideal length, x, minus the maximum allowable deviation, y.

64.8cm + 62.2cm = x + y + x - y

127.0cm = 2x

63.5cm = x

There are now two equations with two unknowns so both variable can be solved for.

Add the equations together and solve for the ideal length, x.

64.8cm = 63.5cm + y

1.3cm = y

Substitute x into either of the original equations and solve for y.

Result:

x = 63.5cm

±y = ±1.3cm

they can both be solutions depends on the equation

step-by-step explanation:

what is the equation? ?