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Rezolvati in Z ecuatiile: a) x+3=12; b) x+5=2; c) x+10= -9; d) x+23= -46; e) x+(-6)=8; f) x+(-18)=-10. Va rog ajutatima e urgent.

Răspuns :

Trombolistul
a)x+3=12

x=12-3=9

b)x+5=2

x=2-5=-3

c)x+10=-9

x=-9-10=-19

d)x+23=-46

x=-46-23=-69

e)x+(-6)=8

x+-6=8

x-6=8

x=8+6=14

f)x+(-18)=-10

x+-18=-10

x-18=-10

x=-10+18=8

a)x+3=12

x=12-3

x=9

verificare:9+3=12

b)x+5=2

x=2-5

x=-3

verificare:-3+5=2

c)x+10=-9

x=-9-10

x=-19

verificare:-19+10=-9

d)x+23=-46

x=-46-23

x=-69

verificare:-69+23=-46

e)x+(-6)=8

x=8-(-6)

x=14

verificare:14+(-6)=8

f)x+(-18)=-10

x=-10-(18)

x=8

verificare:8+(-18)=-10

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