2 / 4 x 100
= .50 x 100
= 50%
9 times 5 equals 45 so yes
The first equation is

The second equation is

If you sum the two equations you'll cancel y:

And since the sum must be 11, we have y=9.
Answer:
8/5×3/7=
8 × 3
5 × 7
= 24/35
Step-by-step explanation:
24/35
No solution / no x
D=b^2-4*a*c -> D=-4^2-4*1*21 -> D=-28 -> D<0, no solution