Question

Помогите пожалуйста))

Answer 1

$left { {{3(x-5)-1=-2y} atop {3(x-y)-7y=-4}} right. = textgreater left { {{3x-15-1=-2y} atop {3x-3y-7y=-4}} right. = textgreater left { {{3x-16=-2y} atop {3x-10y=-4}} right. = textgreater newline = textgreater left { {{3x=-2y+16} atop {-2y+16-10y=-4}} right. = textgreater left { {{3x=-2y+16} atop {-12y=-20}} right. = textgreater left { {{3x=-2y+16} atop {y=frac{20}{12}=frac{5}{3}}} right. = textgreater newline left { {{3x=frac{-2*5}{3}+16} atop {y=frac{5}{3}}} right. = textgreater newline left { {{3x=frac{38}{3}} atop {y=frac{5}{3}}} right. = textgreater$$left { {{3x=frac{38}{3}} atop {y=frac{5}{3}}} right. = textgreater x= 38/9$

Answer 2

Спасибо)