А+345=376+324 ; 756-х=523-196

Question

А+345=376+324 ; 756-х=523-196

Answer 1

А=376+324-345
а=355

-х=523-196-756
-х=-429
х=429

Answer 2

А=376+324-345
а=355

х=756-(523-196)
х=756-327=429