Question

(5/6×x-1,1)×0,8=5/6× x-1,98

Answer 1

$( \frac{5}{6} x - \frac{11}{10} ) \times \frac{8}{10} = \frac{5}{6} x - 1.98 \\ \frac{4}{6} x - 0.88 = \frac{5}{6} x - 1.98 \\ \frac{1}{6} x = 1.1 \\ x = \frac{11}{10} \times \frac{6}{1} \\ x = \frac{66}{10}= \\ = 6.6$

Answer 2

0.8(5/6х-1.1)-5/6х+1.98=0
2/3х-0.88-5/6х+1.98=0
-1/6х+1.1=0
-1/6х=-1.1
1/6х=1.1
х=1.1 : 1/6
х=6.6