Will give a brainliest if ur 100%

if 75 equals a number plus four times the number, find the number.

a.
–15
b.
30
c.
15
d.
–30

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

With finding limits of multi variable !