Question

Решите уравнения
y:2-275=145
48:z+879=887
974-b:7=969

Answer 1

у:2-275=145
у:2=145+275
у:2=420
у=420х2
у=840
проверка
840:2-275=145
420-275=145
145=145

48:z+879=887
48:z=887-879
48:z=8
z=48:8
z=6
проверка
48:6+879=887
8+879=887
887=887

974-b:7=969
b:7=974-969
b:7=5
b=5х7
b=35
проверка
974-35:7=969
974-5=969
969=969