Question

Aflati nr rational x : b) x+1/2 + 2x+6/3 = 3x+21/5​

Answer 1

( x + 1 )/2 + ( 2x + 6 )/3 = ( 3x + 21 )/5  / ( × 30 )

15( x + 1 ) + 10( 2x + 6 ) = 6( 3x + 21 )

15x + 15 + 20x + 60 = 18x + 126

35x + 15 + 60 = 18x + 126

35x + 75 = 18x + 126

35x - 18x = 126 - 75

17x = 51

x = 51 : 17

x = 3

Answer 2

b)(x+1)/2+(2x+6)/3=(3x+21)/5

15(x+1)+10(2x+6)=6(3x+21)

15x+15+20x+60=18x+126

35x+75=18x+126

35x-18x=126-75

(35-18)x=51

17x=51

x=51:17

x=3