1. Subtract 8 from both sides
2. Simplify to get x= -23
<span> x≥10
you add 4 to both sides</span>
<span>Maria tiene 32 kg y javier tiene 51 kg
</span>
(google translate, bad spanish)
The expression you want to simplify is 0-(x-y).
0-(x-y)
=-(x-y)
=-x+y
You just have to treat the negative sign in front of (x-y) as a -1 and distribute it to both x and -y.
Answer:
The ratio of boys to girls is 4:5. So let 4x be the number of boys and 5x be the number of girls. Then 4x+5x = 9x is the total number of students. Then the fraction of boys in the class is 4x/9x = 4/9.
