You really have 2 separate equations to solve here:
1) 5(x-1) = - 20 => 5x - 5 = -20 => 5x = -15 => x = -3
2) 3y = -15 => y = -5
Answer:

Step-by-step explanation:
1.The expression given is in division so when changing to multiplication the fraction is reversed.
2.Using algebra identity
.
3. Taking the common factor 5 out.
4. Finally cancelling the like terms from the numerator and denominator.
I think the answer to this question is option D
They equal because 1/3 is probs 30% idk I'm not working on these
The tangent of x is defined to be its sine divided by its cosine: tan x = sin x cos x . The cotangent of x is defined to be the cosine of x divided by the sine of x: cot x = cos x sin x .