Question

Vă rog ajutațimă
A) x+7=3
B)6-x=15
C)-2-x=-5
D)16-x=-4
E)11-x=14
F)-x+4=-9

Answer 1

a) x= 3-7=-4
b)-x=15-6=9
x= -9
c)x=-2+5=3
d)x=16+4=20
e)x=11-14=-3
f)-x=-9+4=-5

Answer 2

a)  

x + 7 = 3

x = 3 - 7

x = - 4

Verific:   - 4 + 7 = 3

b)

6 - x = 15

x = 6 - 15

x = - 9

c)

- 2 - x = - 5

x = - 2 - ( - 5 )

x = - 2 + 5

x = 3

d)

16 - x = - 4

x = 16 - ( - 4 )

x = 16 + 4

x = 20

e)

11 - x = 14

x = 11 - 14

x = - 3

Verific:    11 - ( - 3 ) = 11 + 3 = 14

f)

- x + 4 = - 9

- x = - 9 - 4

x = 13