Question

Помогите хелп плиз даю 100 баллов

Answer 1

3x - 6 -2y -2=-16,

5x-15 + 8y -16=51

3x-2y=-8 (*4)

5x+8y=82

12x-8y=-32

+

5x+8y=82

17x=50;

x=50/17

5((50/17)-3)+8(y-2)=51

5(2+16/17 -3)+8y=67

5(-1 + 16/17)-67=-8y

-5+80/17 - 67 =-8y;

-72+80/17 = -8y

y=(-72+80/17)/(-8)

y=143/17

Answer 2

разве

Answer 3

верно x=50/17=2 целых 16/17 и y=143/17 =8 целых 7/17........если условие записано

Answer 4

$displaystyleleft {{{3*(x-2)-2*(y+1)=-16} atop {5*(x-3)+8*(y-2)=51}} right. Rightarrowleft {{{3x-6-2y-2=-16} atop {5x-15+8y-16=51}} right. Rightarrow\\\ Rightarrow left {{{3x-2y=-8}*4atop {5x+8y=82}} right. Rightarrow left {{{12x-8y=-32} atop {5x+8y=82}} right. Rightarrow left {{{17x=50} atop {5x+8y=82}} right. Rightarrow$

$displaystyleRightarrow left {{{x=frac{50}{17}} atop {frac{5*50}{17} +8y=82}} right. Rightarrow left {{{x=frac{50}{17}} atop {8y=82-frac{250}{17}}} right. Rightarrowleft {{{x=frac{50}{17} } atop 8y=frac{1144}{17}}} right. Rightarrow left {{{x=frac{50}{17}} atop {y=frac{143}{17}}} right.$

Answer 5

писала в редакторе)))))