-3 I think because 9x3= 27 so 9x-3= -27
So first subtract 20 from both sides of the equation.
3x-4=35
now add 4 to both sides.
3x=39
now divide both sides by
x=13
3x + 15 - 9 = 2(x +2)
3x + 6 = 2(x +2)
3x + 6 = 2x + 4
3x + 6 - 2x = 2x - 2x + 4
x + 6 = 4
x + 6 -6 = 4 - 6
x = -2
Hi !
I’m sorry I won’t be doing the solving for you because it should be easy but I will give you the logic in case you don’t know how to solve them...
Please look at the picture below
According to the theorem we know that DE is:
DE = 1/2 ( BC)
Solve for X then find the values.
Note: remember that if you want to make your life easy multiply both side by 2 to get rid of the 1/2.
So 5 red cars
1/3 of all cars are red
therefor
5=1/3 of all cars
'of' means multply
5=1/3 times all cars
multiply both sides by 3
15=all cars
how many are left
basically how many are NOT red
15=all
red=5
all-red=others
15-5=others=10
10 cars are left