Question

Реши уравнения: 380+х=720; 380+х=260 +460; 900-z=420;900-z=360+60

Answer 1

1) x=720-380
x=340
2) x+380=260+460
x+380= 720
x=720-380
x=340
3) z=900-420
z= 480
4) 900-z=420
z=900-420
z=480