1 .(3/4+1/6)/3=11/12*1/3=11/36
2. (5/6+-1/2):9=1/3*1/9=1/27
3. 11/36+1/27=37/108
1 3/4-5/12=4/12=1/3
2. 3-1/16:1/8=3-1/16*8/1=3-8/16=3-1/2=2.1/2
3. 1/3*2.1/2=1/3*5/2=5/6
4х-3х=101
х=101
ответ : х=101
450:(18-y:7)=50
(18-у:7)=450:50
(18-у:7)=9 3)у=9*7
у=63 450:(18-63:7)=50 50=50
Ответ:у=63