Решите уравнение:
а) 210 − x = −210;
б) 210 * x = 30;
в) 210 + x = −90;
г) 210 : x = −3;
д) 210 + x = −65;
е) 210 * x = −10;
ж) 210 + x = 130;
з) 210 + x = −65;
и) 210 − x = 350.
210 − x = −210
x = 210 − (−210)
x = 210 + 210
x = 420
210 * x = 30
210 + x = −90
x = −90 − 210
x = −300
210 : x = −3
x = 210 : (−3)
x = −70
210 + x = −65
x = −65 − 210
x = −275
210 * x = −10
210 + x = 130
x = 130 − 210
x = −80
210 + x = −65
x = −65 − 210
x = −275
210 − x = 350
x = 210 − 350
x = −140