2x^2=50
Tìm x:
a) 2+4+6+...+2x= 420
b)1+3+5+...+(2x+1)= 289
c)50-[(50-8x):2+3]= 42
Giúp mình với
2x+50%=-2,5
36-2x+50=x+14
50%x+2x=-13,25
(2x+1)×(3y-2)=50
72-x=50
2x-138=72
5.3x = 135
4x + 9 = - 26 - x
2x + 3x =75
- x - 2x = - 50 + 65
|2x^2-50|+|x+5|=0