РЕШИТЕ УРАВНЕНИЯ 4,2:X=-1 3/5 13/20:(3/8+x)=-2/3

Question

РЕШИТЕ УРАВНЕНИЯ 4,2:X=-1 3/5 13/20:(3/8+x)=-2/3

Answer 1

4,2:х=-1 3/5
х=4,2:(-1 3/5)
х=4,2:(-1,6)
х=-2,625 или
х=-2 5/8

13/20:(3/8+х)=-2/3
3/8+х=13/20:(-2/3)
3/8+х=-39/40
х=-39/40-3/8
х=-39/40-15/40
х=-54/40
х=-1 14/40
х=-1 7/20 или
х=-1,35