Question

3/8х+25=100,1/9х-20=56,40-3/8х=35 1/2,28+4/5х=32

Answer 1

1)3/8х+25=100
3/8х=100-25
3/8х=75
х=75:3/8
х=200
2)1/9х-20=56
1/9х=56+20
1/9х=76
х=76:1/9
х=684

Answer 2

тогда третье:

Answer 3

40-(3 x)/8 = 71/2

Answer 4

9/2-(3 x)/8 = 0

Answer 5

1/8 (320-3 x) = 71/2

Answer 6

x = 12