помогите плииииииииз очеень надоо

 

 

(x-y)/4=4-(3x+y)/8(x+3y)/2-(4x-y)/5=3(x-y)/4=4-(3x+y)/8 0.625x-0.125y-4=0 

y=5x-32(x+3y)/2-(4x-y)/5=3(x+3*(5x-32))/2-(4x-(5x-32))/5=3(x+15*x-96)/2-(4x-(5x-32))/5-3=016x/2-96/2-(4x-(5x-32))/5-3=08x-48-(4x-(5x-32))/5-3=08x-48-(-x+32)/5-3=08x-48-(-x/5+6.4)-3=08x-48+x/5-6.4-3=08.2x-48-6.4-3=08.2x-54.4-3=08.2x-57.4=0

x=57.4/8.2

x=7 (x-y)/4=4-(3x+y)/8 (7-y)/4=4-(3*7+y)/8  

7/4-y/4-4+(3*7+y)/8=0

-2.25-y/4+(3*7+y)/8=0

-2.25-y/4+21/8+y/8=0

-2.25-y/4+2.625+y/8=0

0.375-y/4+y/8=0

0.375-0.125y=0

y=0.375/0.125

y=3

Ответ: x=7; y=3.