Answer:

Step-by-step explanation:
Solve for
:

-Multiply both sides of the equation by the denominator
:


-Subtract both sides by
:


So, the value of
is
.
1) Expand by distributing terms
7a+7 x-3
Simplify 7x-3 to -21
7a-21
Answer: X=8
Step-by-step explanation:
168/6=28. x+20=28. 8+20=28.
6(8+20)=168
∠D= 87°, ∠E = 50°
Sum of three angles in a triangle is 180°
∠F = 180 - (∠D + ∠E)
∠F = 180 - (87 + 50)
∠F = 180 - 137
∠F = 43°
Side opposite to greatest angle is the longest side.
Among angle D, E and F, angle D is the greatest angle
So side opposite to angle D is the longest side which is EF
Option B is the answer