For which equation is x = 5 a solution? 1. 2 + x = 3

2. 3x = 15

3. 2/x = 10

4. x − 7 = 12

2

Step-by-step explanation:

3x=15

divide both sides by 3

x=5

2. 3x = 15

Step-by-step explanation:

3x=15

divide the 3 out on both sides

so 3/3 and 15/3

and you are left with

x=5

1.) x=1

3.)x=1/5

4/)x=19

So number two is the correct answer.

sites:

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°