Question

решите уровнение пж пж пж пж

Answer 1

-5/7х+3/4+2/3=5/4
-5/7х=5/4-17/12
-5/7х=-2/12
х=-2/12  : (-5/7)
х=-7/30

Answer 2

5/7*(21/20-х)+16/21:8/7=1 1/4
3/4-5/7х+16/21:8/7=1 1/4
3/4-5/7х+2/3=5/4
-5/7х=5/4-3/4-2/3
-5/7х=-1/6
х=-1/6:(-5/7)
х=7/30