Question

7/8+x=11/36
3/5умножить x=28/45
4/7:x=7/12

Answer 1

$frac{7}{8} + x = frac{11}{36} \ \ x = frac{11}{36} - frac{7}{8} \ x= frac{11}{4 times 9} - frac{7}{4 times 2} \ x = frac{22 - 63}{4 times 9 times 2} \ x = - frac{41}{72}$
$frac{3}{5} x = frac{28}{45} \ x = frac{28}{45} times frac{5}{3} \ x = frac{28}{27} \ x = 1 frac{1}{27}$
$frac{4}{7 } div x = frac{7}{12} \ x = frac{4}{7} div frac{7}{12} \ x = frac{4 times 12}{7 times 7} \ x = frac{48}{49}$

Answer 2

спасибо