Question

determinati numarul necunoscut din fierace proportie: a) x-2 supra 5= 2x-1 supra 13 b)2x+3 supra x+5= 7 supra 4
c)4x-5 sipra 3=2x+8 supra 2
d)3x+11 supra 9= x+6 supra 4
e)4 supra 9= 3x+1 supra 2x+12
f)3 supra 5x+2= 7 supra 2x+15

Answer 1

a) 13x - 26 = 10x - 5
3x = 21
x = 7
b) 8x + 12 = 7x + 35
x = 23
c) 8x - 10 = 6x + 24
2x = 34
x = 17
d) 12x + 44 = 9x + 54
3x = 10
x = 10/3
e) 8x + 48 = 27x + 9
19x = 39
x=39/19
f) 6x + 45 = 35x + 14
29x = 31
x= 31/29