In a certain fraction, the numerator is 4 less than the denominator. if 4 is added to both the numerator and the denominator , the resulting fraction is equal vhat was the original 8/12 fraction (not necessarily written in lowest terms

The original fraction was

Step-by-step explanation:

The correct question is

In a certain fraction, the numerator is 4 less than the denominator. If 4 is added to both the numerator and the denominator , the resulting fraction is equal to 8/12. What was the original  fraction (not necessarily written in lowest terms)

Let

x ----> the numerator of the original fraction

y ----> the denominator of the original fraction

we know that

so

the original fraction is

If 4 is added to both the numerator and the denominator , the resulting fraction is equal to 8/12

so

Solve for y

Find the value of x

therefore

The original fraction was

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.