Реши уравнения.
x : 9 = 11;
x + 75 = 2075;
x * 8 = 720;
x − 80 = 360;
56 : x = 56;
90 − x = 90.
x : 9 = 11
x = 11 * 9
x = 99
x + 75 = 2075
x = 2075 − 75
x = 2000
x * 8 = 720
x = 720 : 9
x = 80
x − 80 = 360
x = 360 + 80
x = 440
56 : x = 56
x = 56 : 56
x = 1
90 − x = 90
x = 90 − 90
x = 0