Question

add and simplify (see picture)

Answer 1

they need to have the same denominator, just multiply one fraction by -1/-1

Answer 2

for you to add or subtract

Answer 3

3x/(x-3)(3-x)

Answer 4

you will notice by multiply the top and the bottom of one of the fractions by -1 doesn't actually change the fraction but manipulates it without changing its actual value

x = 2(x)/2 = x*1

Answer 5

The answers are:
1
1/x-3
1/2

Answer 6

Matt6288 I think you have it wrong

x/(x-3) + 3/(3-x)*(-1/-1)
=
x/(x-3) - 3/(-3+x)
=
(x - 3)/(-3 + x)
=
1

Answer 7

Just remember to add or subtract fractions you need to have the same denominator on both fractions and remember this rule and you will never have a problem