Question

2x+3y=7 7x-3y=11 Система уровнения

Answer 1

3y=7-2x

7x-(7-2x)=11 7-2x=7x-11

7+11=7x+2x

18=9x

x=18:9=2

x=2

подставляем:

2*2+3у=7

3у=7-4

3у=3

у=3:3

у=1

ответ: x=2; y=1

Answer 2

Sure thing! It looks like you're asking for help with a system of equations. The system you provided is: 2x + 3y = 7 7x - 3y = 11 To solve this system, we can use the elimination method. First, we can multiply the first equation by 3 and the second equation by 2 to eliminate y: 6x + 9y = 21 14x - 6y = 22 Next, we can multiply the first equation by 2 and subtract it from the second equation: 14x - 6y - (4x + 6y) = 22 - 14 10x = 8 Finally, we can solve for x: x = 8/10 = 4/5 To find y, we can substitute x back into one of the original equations: 2(4/5) + 3y = 7 8/5 + 3y = 7 3y = 7 - 8/5 3y = 27/5 - 8/5 3y = 19/5 y = 19/15 Therefore, the solution to the system is (x, y) = (4/5, 19/15). Let me know if you have any questions! ????