Question

DAU COROANA!
a) x + 16-30= -5 b)-(2-3) + x = 21 c) x-(6-4) =0 d) x + (-5+1)-6=-1+9
e) x + (-6)-(-7)=-[-2-(3-1)] f)-2-(4-3) -(3-4) + x = -(9-3-1)​

Answer 1

Explicație pas cu pas:

a) x + 16-30= -5

x +16= -5 +30

× +16 = 25

x = 25 -16

× = 9

b) -(2-3) + x = 21

-2 +3 +× = 21

1 + x = 21

x = 21 - 1

x = 20

c) x-(6-4) =0

x - 2 = 0

x = 2

d) x + (-5+1)-6=-1+9

x - 5 +1 - 6 = 8

x - 5 +1 = 8+6

× -5 +1 = 14

x-5 = 14 -1

× - 5 = 13

x = 13 +5

×= 18