Răspuns:
a) 5x-2=2x+7
5x-2x=2+7
3x=9=>x=3
b) 3x+5=4x-8
3x-4x=-5-8
-x=-13=>x=13
c)6-2x=-7x+21
5x=15=>x=3
d) - 4x+5=4x-27
-8x=-32
x=4
e) - 2x+5= - 3x+4
x=-5+4= - 1
f) - 8-14x=2x-8
-12x=0
x=0
a) 5x - 2 = 2x + 7
5x - 2x = 7 + 2
3x = 9
x = 9 : 3
x = 3
b) 3x + 5 = 4x - 8
3x - 4x = - 8 - 5
-x = -13
x = 13
c) 6 - 2x = -7x + 21
-2x + 7x = 21 - 6
5x = 15
x =15 : 5
d) -4x + 5 = 4x - 27
-4x - 4x = -27 - 5
-8x = -32
x = 4
e) -2x + 5 = -3x + 4
-2x + 3x = -5 + 4
x = -1
f) -8 - 14x = 2x - 8
-14x - 2x = -8 + 8
-16x = 0
x = 0
Explicație pas cu pas:
