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e) 3*2-9-(2-6)= 6- 9+4=1
f) 12*2,4-0,8= 28,8- 0,8=28
e)3x-3do potęgi 2 -(2-3x)= 3*2-27-(2-3*2)=6-27-(2-6)=-21-(-4)=-21+4=-16
f)12(x+0,4)-0,4x=12(2+0,4)-0,4*2=12*2,4-0,8=28,8-0,8=28
pozdrawiam:)
e)3*2-9-(2-3*2)=6-9-(-4)=1
f)12(2+0.4) - 0.4*2=28.8-0.8=28