Question

Помогите мне 3* х-7800=1200

(у+2958):57=139

38007:(5000-z)=9

Answer 1

3 * х - 7800 = 1200
3х = 1200 + 7800
3х = 9000
х = 3000

(у + 2958) : 57 = 139
у + 2958 = 139 * 57
у + 2958 = 7923
у = 7923 - 2958
у = 4965

38007 : (5000 - z) = 9
5000 - z = 38007 : 9
5000 - z = 4223
z = 5000 - 4223
z = 777