Elpida ha preparat unes fulles de parra farcides per a compartir amb 3 amigues. Al final del dinar, ella ha consumit 5 fulles de parra menys que Lídia, 7 menys que Sofia i 3 menys que Glicèria. En total, les quatre amigues han menjat 35 fulles de parra farcides. Quantes ha menjat cada una?

Elpida: 5

Lydia: 10

Sofia: 12

Glyceria: 8

Step-by-step explanation:

(English question:

Elpida has prepared some stuffed vines to share with 3 friends. At the end of the meal, she consumed 5 less vines leaves than Lydia, 7 less than Sofia and 3 less than Glyceria. In total, the four girlfriends ate 35 stuffed vines. How many have you eaten each?)

Let's call the amount of vines consumed by Elpida 'a', by Lydia 'b', by Sofia 'c' and by Glyceria 'd'.

If the information given, we can write the following equations:

a = b - 5 -> b = a+5

a = c - 7 -> c = a+7

a = d - 3 -> d = a+3

a + b + c + d = 35

using the values of b, c and d in the last equation, we have:

a + a + 5 + a + 7 + a + 3 = 35

4a = 20

a = 5

so, we have that:

b = a+5 = 10

c = a+7 = 12

d = a+3 = 8

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

the answer

b. they are parallel and will never intersect.