2x + 5 = 10 What is the first operation used in solving this equation?
IM SLOW OK

First operation is "Subtract 5 from both sides"

Explanation:

To solve equations, we follow PEMDAS in reverse.

The last step in PEMDAS is subtraction. So we need to undo subtraction, but there isn't any subtraction being done here.

So the next step up is undoing addition.

We need to undo the "plus 5". To do so, we subtract 5 from both sides

2x+5 = 10

2x+5-5 = 10-5 ... subtracting 5 from both sides

2x+0 = 5

2x = 5

The next step is to undo the multiplication by dividing both sides by 2

2x = 5

2x/2 = 5/2 ... divide both sides by 2

x = 5/2

x = 2.5

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.