Задание 1
1)(3*(1/4)+0.25-1(5/24))/(2*(3/4)-4*(1/2)-0.75)/(-4*(7/12)=((3/4)+(1/4)-(5/24)÷((3/2)-2-(3/4))÷(-7/3)=(19/24)÷((-5/4))÷((-7/3))=(19/24)*(4/5)*(3/7)=(19/6)*(1/5)*(3/7)=(19/2)*(1/5)*(1/7)=(19/70)=0.27
2)-24.6÷(-2.35+0.7÷2*(1/3))-15.36=-24.6÷(-2.35+(7/10)*(1/2)*(1/3))-15.36= -24.6÷(-2.35+(7/60))-15.36=-24.6÷(-67/30)-15.36=(-123/5)÷(-67/30)-(384/25)=(123/5)*(30/67)-(384/25)=123*(6/67)-(384/25)=(738/67)-(384/25)=(-7278/1675)=-4(578/1675)=-4.34
Задание 10
1)2.5х=-1
х=(-1/2.5)=-0.4
2)0.3x=1
x=(1/0.3)=(10/3)=3(1/3)=3.33333
3)7x=-3
x=(-3/7)=-0.42
5)|x|-5=0
|x|=5
x1=5, x2=-5
6)|x|+3.2=8
|x|=8-3.2=4.8
x1=4.8, x2=-4.8
7)4.1-|x|=5
-|x|=5-4.1
-|x|=0.9
|x|=-0.9
x=0.9
8)|3x+1.8|=0
3x+1.8=0
3x=-1.8
x=-0.6
9)9|x|-6=0
9|x|=6
|x|=(2/3)
x1=(2/3), x2(-2/3)