Question

1 2/7z+7/8=1 3/8 помогите решить

Answer 1

1 2/7 z+7/8=1 3/8
×)1 2/7z=9/7z
2)1 3/8=11/8
9/7z+7/8=11/8
9/7z=11/8-7/8
9/7z=4/8=1/2
2×9z=1×7
18z=7
z=7/18
оивет: z=7/18