Question

найти х, если:
3/8*х+25=100
1/9*х-20=56
7/15*х-503/4=491/4
40-3/8*х=351/2
(24/5*х-50):2/3=51
(41/2-2*х)*32/3=11/15

Answer 1

1). 3/8*х+25=100
3/8*х=100-25
3/8*х=75
x=75*8/3
x=200
2).1/9*х-20=56
1/9*х=56+20
1/9*х=76
x=76*9
x=684
3).7/15*х-503/4=491/4
7/15*х=503/4+491/4
7/15*х=497/2
x=497/2*15/7
x=1065/2
4).40-3/8*х=351/2
3/8*х=40-351/2
3/8*х=-271/2
x=-271/2*8/3
x=-1084/3
5).(24/5*х-50):2/3=51
(24/5*х-50)=51*2/3
(24/5*х-50)=34
24/5*х=84
x=35/2
6).(41/2-2*х)*32/3=11/15
(41/2-2*х)=11/15*3/32
(41/2-2*х)=11/160
2x=41/2-11/160
2x=3269/160
x=3269/320
x=10 69/320