2x+12=4x
Make two equations, and solve for x.
1. 2x+12= 4x 2. 2x+12= -4x subtract 2x from both sides
12=2x 12= -6x
6=x -2=x
plug in the x values to know if they are the solution for the eqaution.
2(6) +12= 4(6) 2(-2) +12= -4(-2)
12+12= 24 -4+12=8
24=24 8=8
The equation is true, it's all real numbers or infinite solutions.
The equation and graph show the cost to rent movies from two different companies. The cost is a function of the number of movies rented.The description best compares the two functions?
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Answer:
x = 3 or x = - 6
Step-by-step explanation:
Factor and Solve. x^2 + 3x - 18 = 0
We can use the Diamond method of factoring.
Factor -18 = 6 * -3; and 3 = 6 + -3
so
x^2 + 3x - 18 = x^2 -3x + 6x - 18 = 0
= (x^2 -3x) + ( 6x - 18) = 0
= (x^2 -3x) + ( 6x - 18) = 0
= x(x - 3) + 6*(x - 3) =0
= (x - 3)*(x + 6) = 0
so Either x - 3 = 0 or x + 6 = 0
x = 3 or x = - 6
Step-by-step explanation:
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