Question

Побыстрей пожалуйста!)

Answer 1

Ответ:

Пошаговое объяснение:

1) х=4,25-7,16

Х=-2,91

2) у=-4 2/3+2 1/6

У=-4 4/6+2 1/6

У=-2 3/6=-2 1/2

Answer 2

Ответ:

$7,16 +x=4,25\\x=4,25-7,16\\x=-2,91$

Проверка:

$x=-2,91\\7,16+(-2,91)=4,25\\7,16-2,91=4,25\\4,25=4,25$

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$-4\frac{2}{3}-y=-2\frac{1}{6}\\\\-\frac{14}{3}-y=-\frac{13}{6} \\\\-y=-\frac{13}{6}+\frac{14}{3}\\\\-y=-\frac{13}{6}+\frac{28}{6}\\\\-y=\frac{15}{6}\\\\y=-\frac{15}{6}\\\\y=-\frac{5}{2}\\\\y= -2,5$

Проверка:

$y=-2,5\\\\-4\frac{2}{3} -(-2,5)=-2\frac{1}{6}\\\\-\frac{14}{3}+2,5=-\frac{13}{6}\\\\-\frac{14}{3}+\frac{2,5}{1} =-\frac{13}{6}\\\\-\frac{28}{6}+\frac{15}{6} =-\frac{13}{6} \\\\-\frac{13}{6}=-\frac{13}{6}$