The value of x in the equation is - 3.
<h3>How to find the variable in an equation?</h3>
Variables are number represented by a letter in an equation.
Therefore,
-5x - 9 = 2x + 12
subtract 12 from both sides of the equation
-5x - 9 = 2x + 12
-5x - 9 - 12 = 2x + 12 - 12
-5x - 21 = 2x
add 21 to both sides of the equation
-5x - 21 = 2x
-5x - 21 + 21 = 2x + 21
-5x = 2x + 21
subtract 2x from both sides
-5x = 2x + 21
-5x - 2x = 2x -2x + 21
-7x = 21
divide both sides by -7
-7x / -7 = 21 / - 7
x = -3
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Answer:
Write in y=mx+b, or slope intercept form.
y represents the total cost of the function hall.
x represents the number of guests.
y=250+15x
Remainder when x^2 - 5x - 22 is divided by x + 3
R = f(-3) = 9 + 15 - 22
R = 2
