ответ:3 1/8-2 2/3+1/6=
3 3/24-2 16/24+4/24=
11/24+4/24=15/24=5/8
3 7/8-2 3/4+1/2=
3 7/8-2 6/8+4/8=
1 1/8+4/8=1 5/8
2 13/30-(1 1/10+1/5)=
2 13/30-1 1/10-1/5=
2 13/30-1 3/30-6/30=
2 13/30-1 9/30=1 4/30=1 2/15
4 14/45-1 7/15-3/5=
4 14/45-1 21/45-27/45=
4 14/45-1 48/45=
4 14/45-2 3/45=2 11/45
4 3/5-2+1/10=
2 3/5+1/10=2 6/10+1/10=
2 7/10
3 5/14-1-6/7=
2 5/14-6/7=2 5/14-12/14=
1 7/14=1 1/2
2 8/15-(1 3/10+2/5)=
2 8/15-1 3/10-2/5=
2 16/30-1 9/30-12/30=
2 16/30-1 21/30=
15/30=1/2
4 11/30-2 9/20-1/10=
4 22/60-2 27/60-6/60=
4 22/60-2 33/60=
1 49/60
Пошаговое объяснение:
a)-2/7+(-3/7)= -2/7-3/7= -5/7
б)-1 4/15+(-2 3/15)= -1 4/15-2 3/15= -(1 4/15+2 3/15)= -((1+2)+(4/15+3/15))= -(3+ 7/15)= -3 7/15
в)-2 3/5+(-4 1/5)= -2 2/5-4 1/5= -(2 3/5+4 1/5)= -((2+4)+(3/5+1/5))= -(6+4/5)= -6 4/5
г)5/18+(-4/9)=5/18-4/9= -1/6
е)-4 9/14+(-3 4/7)= -4 9/14-3 4/7 = -(4 9/14+3 4/7)= -((4+3)+(9/14+4/7))= -(7+17/14)= -(7+1 3/14)= -(7+1+3/14)= -(8+3/14)= - 8 3/14
ж) -37+(-13)= -37-13= -50
з) -0,87+( -0.03)= -0,87-0,03= -0,9= -9/10
и)-147+(-256)= -147-256= -403
к)-172+(-5,9)= -172-5,9= -177,9
л)-217+(-71)+(-11)= -217-71-11= -299
Решение: -2,27x+7,3x=5,03x
5,03x-19,3x=-14,27x.