Question

упростите уровнения 276m-(172m+14m) 26z+(13z-5z)+z

Answer 1

172m+14m=m(172+14)=186m
276m-186m=m(276-186)=90m

13z-5z=z(13-5)=8z
26z+8z+z=z(26+8+1)=35z