Question

7. Află numărul necunoscut: a) x+(-3)=5; b) 7+b= -3; c) -4+y=1 ; d) z+(-4)=-5; e) x+0=-2​

Answer 1

a) x+(-3)=5

x-3=5

x=8

b) 7+b= -3

b= -3-7

b= -10

c) -4+y=1

y=1-(-4)

y=5

d) z+(-4)= -5

z-4= -5

z= -5+4

z= -1

e) x+0= -2

x= -2

Answer 2

a) x+(-3)=5

x=5+3

x=8

b) 7+b=-3

b=-3-7

b=-10

c) -4+y=1

y=1+4

y=5

d) z+(-4)=-5

z=-5+4

z=-1

e) x+0=-2

x=-2