Question

{x+y/2+x-y/3=6 x+y/4-x-y/3=6

Answer 1

Ответ:

(5; 11)

Объяснение:

(x+y)/2+(x-y)/3=6 |*6

(x+y)/4-(x-у)/3=6 |*12

3(x+y)+2(x-y)=36

3(x+y)-4(x-у)=72

3х+3у+2х-2у=36

3х+3у-4х+4у=72

5х+у=36

-х+7у=72

у=36-5х

-х+7(36-5х)=72

-х+252-35х=72

-36х=72-252

-36х=-180

х=-180:(-36)

х=5

у=36-5х

у=36-5*5=36-25=11

Ответ: х=5; у=11