3/2*(-3/2)*5/4*(-6/5)*7/6= (3*(-3)*5*(-6)*7)/ (2*2*4*5*6)= (3*(-3)*(-7))/(2*2*4)= 63/16= 3 15/16
Б)=3(5/12)+12(2/3)+4(1/9)=15/36+24/36+4/36=(15+24+4)/36=43/36=1 цел. 7/36
4*6=24
8*9=72
4*8=32
6*9=54
4*9=36
6*8=48
28/5+24/5(35/4 - 47/6)= 28/5+24/5 *(70/12 - 94/12)=28/5-24/5 * 2= -20/5=-4
1) <span>123х+458+254х+26=1238; 123х+254х=1238-26-458; 377х=754; х=754:377; х=2.
2) <span>2(6х+8)-3х=313; 12х+16-3х=313; 12х-3х=313-16; 9х=297; х=297:9; х=33
3) <span>708+139х+24+341х=1692; 139+341х=1692-24-708; 480=960; х=960:480; х=2
4) <span>3(7+4х)-8х=201; 21+12х-8х=201; 12х-8х=201-21;4х=180; х=180:4; х=45</span></span></span></span>