1. (4⁻⁷*4⁻¹⁰)/(4⁻¹⁶)=4⁻¹⁷⁺¹⁶=4⁻¹=1/4=0.25
2. 4x+7+(5-2x)=(3+x)-9; 4x+7+5-2x=3+x-9; х=-18
3. 280000*1.15=322000(руб.)
1. (4⁻⁷*4⁻¹⁰)/(4⁻¹⁶)=4⁻¹⁷⁺¹⁶=4⁻¹=1/4=0.25
2. 4x+7+(5-2x)=(3+x)-9; 4x+7+5-2x=3+x-9; х=-18
3. 280000*1.15=322000(руб.)