1) 45 + x =97
x =97-45
х=52
2) 500=200+ x
500-200= x
300 = x
3) a+37=400
a=400-37
a=363
4) x + 37 = 390
x = 390-37
x = 353
1) 45 + x =97
x =97-45
х=52
2) 500=200+ x
500-200= x
300 = x
3) a+37=400
a=400-37
a=363
4) x + 37 = 390
x = 390-37
x = 353