Cum se calculeaza sistemul de ecuatii date:
x-y=9
2x+y=21 ?

Răspunsul a fost dat de: USER7762
2 September 2025 matematica 5 minute
4.5
71 Vezi 71 comentarii 10 Distribui

Întrebare

Clasă: Education Materie: matematica
Cum se calculeaza sistemul de ecuatii date:
x-y=9
2x+y=21 ?
Întrebare a fost pusă de:
71 Vezi 71 Răspunsuri

Răspuns (71)

Cel mai bun răspuns
(249)
x=9+y
2(9+y)+y=21

x=9+y
18+2y+y=21

x=9+y
18+3y=21

x=9+y
3y=21-18

x=9+y
3y=3

x=9+y
y=3:3

x=9+y
y=1

x=9+1
y=1

x=10
y=1
Răspunsul a fost dat în data 2 September 2025

Articole relevante

3/10 gray and 51/100 black. the rest are pink or yellow. there are more pink than yellow marbles. what fraction represents the number of pink and yellow marbles.​

160 Vezi 162 comentarii

Dog breeding is an example of natural selection T/F

51 Vezi 51 comentarii

Apply the distributive property to create an equivalent expression 1/3(3j+6) what the answer

92 Vezi 92 comentarii

President truman sent troops to korea without the permission of whom?

69 Vezi 69 comentarii

What should I do if I've tried multiple solutions and am still facing the error?

80 Vezi 80 comentarii

Bob buys eggs and potatos at a store. He paid a total of @25.95. He paid $2.27 for the eggs and then bought 5 bags of potatoes that each cost the same amount. Write an equation that can be used to determine the cost, x, of each bags of potatoes

160 Vezi 244 comentarii

What are common mistakes when using wildcards in SUMIF that lead to #VALUE! errors?

83 Vezi 83 comentarii

Can exceeding Excel's character limit for a SUMIF formula result in a #VALUE! error?

84 Vezi 84 comentarii

How to debug a SUMIF formula that returns #VALUE! when summing based on a boolean value?

88 Vezi 88 comentarii

What if my SUMIF criteria range contains merged cells, causing a #VALUE! error?

79 Vezi 79 comentarii

Jelaskan puncak kejayaan Majapahit!

Tonlong cpt bantu!!

68 Vezi 68 comentarii

Could '03cl90d6m49j4dcvgscnshaj26gvcjut.site' be a subdomain rather than a primary domain?

90 Vezi 90 comentarii

instrument cu corzi indragita de zei
prenumele lui schubert
orchestra alcatuita din instrumente aerofine si de percutie
URGENTTTTTT VAROGGGGGGGGGGGGG]

160 Vezi 169 comentarii

what is the mood of Tell Tale Heart with text evidence

54 Vezi 54 comentarii

How does downloading a ComicScreen mod apk differ from purchasing the official Pro version in terms of user experience and support?

131 Vezi 131 comentarii