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

b) 3x = 15

c) x − 7 = 12

d) 2x = 14

for b the answer is x=5

Step-by-step explanation:

3x=15

x=15÷3

×=5

(x+1)^2 + (y-7)^2 = 2^2

Step-by-step explanation:

The center of the circle is at (-1,7) and the radius from the center to the edge is 2, so the equation should look like (x-h)^2 + (y-k)^2 = r^2

You would flip the signs of the center so that when you solve the equation it ends up in the correct place.