Question

Реши уравнения. 48:z+879=889,974-b÷7=869,y÷2-275=145.

Answer 1

48:z+879=889
48:z=889-879
48:z=10
z=48:10
z=4.8
974-в:7=869
в:7=974-869
в:7=105
в=105*7
в=735
у:2-275=145
у:2=145+275
у:2=420
у=420*2
у=840