For <span>12/15=47/50, we multiply 12/15 by (1/3)/(1/3) to get 4/5. For 47/50, we multiply it by (1/10)/(1/10) to get the same denominator and 4/7/5. They are not equal.
For 16/36 and 12/27, we'll notice that 36 and 27 are both multiples of 9, so we need to get that as the denominator! Multiply 16/36 by (1/4)/(1/4) because 9 goes into 36 4 times and 12/27 by (1/3)/(1/3) due to that 27 goes into 9 3 times, we get 4/9=4/9 - these are equal!
I challenge you to get the rest of them on your own using my techniques!</span>
Answer:
30
Step-by-step explanation:
If the triangle is equilateral, that means all angles are equal
180/3 = 60 so all angles equal 60 degrees
<Y is an angle in the triangle so it equal 60 degrees
4/3x +20 = 60
Subtract 20 from each side
4/3x +20-20 = 60-20
4/3x = 40
Multiply each side by 3/4 to isolate x
4/3x * 3/4 = 40*3/4
x = 30
Group like terms then
add like terms
d-2d-10+7=8-10+d
-d-3=-2+d
add d to both sides
-3=-2+2d
add 2 to both sides
-1=2d
divide both sides by 2
-1/2=d
