А9х-47=880 7х-х=72 плиз++++++++++++++++++++++++++

Question

А9х-47=880
7х-х=72
плиз++++++++++++++++++++++++++

Answer 1

9х-47=880
9х=880+47
9х=927
х=103


7х-х=72
6х=72
х=12