You can multiply either the top or bottom equation by -1 so lets say you apply it to the bottom equation it’ll look like this:
-9x + 9y = 18
6x - 9y = 12
then the +9y and -9y will cancel out
-9x = 18
6x =12
then you add the two equations together
-3x = 30
divide both sides by -3
x = -10
Answer:
1. $1650
2. $1415.52
3. $5540
4. No
5. 145
6. No
Step-by-step explanation:
1. 2230 - 580
2. 157.28 x 9
3. 6630 - 1090
4.
5. 725 - 580
Hope this helps!
Answer:
☑ Answer is 6
Step-by-step explanation:

» But this is a ratio, so it can be expressed in terms of fractions:

» Divide both the denominator and numerator by 9:

( -18 - 14)/(2 - -6)
-32/8
-4