So you would form a proportion 12/19824=1/x then you would cross multiply 12x= 19824 next you would isolate the variable by using inverse operations 19824 divided by 12 = 1652 toy castles

check the picture below.

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system