Question

ex 7 rezolvati in Q:
a) 8x=x-91
b) -2x-7=9-x
c) 5x=-16+x
d) -1,5x-4,6=-8
e) 4x+1,26=x
f) -7x+9=-4x

va rog dau coroana

Answer 1

Explicație pas cu pas:

a) 8x=x-91

8x - x = - 91

7x = - 91

x = - 91/7

b) -2x-7=9-x

-2x + x = 9+7

-x = 16

x = - 16

c) 5x=-16+x

5x - x = - 16

4x = - 16

x = - 16 : 4 = - 4

d) -1,5x-4,6=-8

-1,5x = - 8 + 4,6

-1,5x = - 3,4

x = - 3,4 : (-1,5) = 2,2(6)

e) 4x+1,26=x

4x - x = - 1,26

3x = - 1,26

x = - 1,26 : 3 = - 0,42

f) -7x+9=-4x

-7x +4x = - 9

-3x = - 9

x = - 9 : (-3) = 3