Ask
your own question, for FREE!
Mathematics
11 Online
Given: 2x+3y=12 2x-y=4 What is the value of x + y? Please explain! Thanxs!!!
Still Need Help?
Join the QuestionCove community and study together with friends!
Weird question at first sight but here goes. Subtract equation 2 from equation 1 giving 4y = 8 Here's why, 2x - 2x = 0, 3y - (-y) = 4y and 12 -4 = 8 hence 4y = 8 From this we get y = 2 by dividing both sides by 4. Substitute the value of y ( 2 remember) into second equation to discover value x. 2x - 2 = 4 which implies (by adding 2 to both sides) 2x = 6 and hence x = 3 Therefore the answer to x+ y is 2 +3 = 5
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
Countless7Echos:
Ah trying out the whole T.V girl drawing :p (I love drawing eyes)
SnowyBreaks:
You ever get the types of dreams where it feels as if you aren't breathing? And w
laylasnii13:
Poem/diary i wrote I Want Out Iu2019m so tired of screaming into walls. Every fight with my mom leaves something broken and itu2019s not just plates or slam
Countless7Echos:
Aye.. I need actually some help on the shading here.. if the light is from above too I just feel something is off.
56 minutes ago
7 Replies
5 Medals
13 hours ago
6 Replies
0 Medals
1 day ago
13 Replies
3 Medals
3 days ago
19 Replies
3 Medals