Answer:
12
Step-by-step explanation:
Answer:
Step-by-step explanation:
<em>Set the problem up as a proportion</em>
<em />
<em />
<em>cross multiply</em>
<em />
<em />
<em>divide both sides by 30</em>
<em />
<em />
<em />
<em>plz mark me brainliest. :)</em>
Answer:
76
Step-by-step explanation:
10+9= 19
19*4=76
First thing First. You must find have a common denominator. If you want to find it then you do this
3: 3 6 9 12 15 18 21
7: 7 14 21 28
Once you found a number they have in common (21) You do this next
3/7 * 3/3 = 9/21
2/3 * 7/7 = 14/21
Now the next thing you do is subtract your numerators but not the denominators
14-9=5
5/12
you cant simplified so your done! Hope this helps!!!! <span />
Multiply the first equation by -2 gives:_
-2y = -8 + 2x
2y = 8 - 2x
adding these 2 equations:-
0 = 0
This shows that the 2 equations are equal so there are infinite solutions
