Answer:
First number: 71/7
Second number: 135/7
Third number: 270/7
Step-by-step explanation:
First number = x
Second number= 2x-1
Third number= 2(2x-1)
x+(2x-1)+2(2x-1)= 68
3x-1+4x-2=68
7x-3=68
7x=71
x=71/7
You can check by plugging in the x into the equation.
Answer:
-6x-4
Step-by-step explanation:
Answer:
The answer is D.
Step-by-step explanation:
I am the most positive ever.
Answer:
x=-7 x=4
Step-by-step explanation:
(X-2)(x+5)=18
FOIL
x^2 +5x -2x-10 =18
Combine like terms
x^2 +3x -10 = 18
Subtract 18 from each side
x^2 +3x -10 -18 = 0
Combine like terms
x^2 +3x -28 =0
Factor
What two numbers multiply to -28 and add to 3
7*-4 = -28
7+-4 = 3
( x+7) ( x-4) =0
Using the zero product property
x+7 =0 x-4=0
x=-7 x=4