Like when adding/subtracting fractions at any other time, you need a common denominator, in this case (x-1)(x+1)=x^2-1 so:
(2(x+1)+3(x-1))/(x^2-1)=4 multiply both sides by (x^2-1)
2x+2+3x-3=4x^2-4 combine like terms on left
5x-1=4x^2-4 subtract (5x-1) from both sides
4x^2-5x-3=0 using the quadratic formula for expediency
x=(5±√73)/8
x≈-0.443 and 1.693
Answer:
12x18
Step-by-step explanation:
There are 6 slices, as 2/(2/6) = 2*(6/2) = 6.
Therefore, Ben ate 1/6 of the cake, as it is one of the six slices. In total, they are 3/6 of the cake, or 1/2.
He didn't distribute the negative in front of the 2 which messed up the rest of the steps
x - 2(5 - 2x) = 10
x - 10 + 4x = 10
5x = 10 + 10
5x = 20
x = 4
Hey ! i’m pretty sure it’s 166 :)
