Question

реши уравнения!!!!!!!! надо

Answer 1

у:2-275=145
у:2=145+275
у:2=420
у=420*2
у=840
840:2-275=145

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

974-b:7=969
b:7=974-969
b:7=5
b=7*5
b=35
974-35:7=969