6 целых4/5-х=1,2. х-8 целых7/9=5/18

6 целых4/5-х=1,2. -х= 1,2 -6 ц. 4/5 -х= - 5 ц. 3/5 х= 5 ц. 3/5 х-8 целых7/9=5/18 х= 5/18 + 8 ц. 7/9 х= 9 ц. 1/18

[latex]6 \frac{4}{5}-x=1.2 [/latex] [latex]x=6 \frac{4}{5} -1.2[/latex] [latex]x= \frac{34}{5}- \frac{6}{5} [/latex] [latex]x= \frac{28}{5} [/latex] [latex]x=5.6[/latex] [latex]x-8 \frac{7}{9}= \frac{5}{18} [/latex] [latex]x= \frac{5}{18}+8 \frac{7}{9} [/latex] [latex]x= \frac{5}{18}+ \frac{79}{9} [/latex] [latex]x= \frac{163}{18} [/latex] [latex]x=9 \frac{1}{18} [/latex]