Question

2x-4 supra 5 +4x+14 supra 15=2 supra 5+2x+7 supra 10- 1 supra 2
dau coroana​

Answer 1

Răspuns:

(2x-4)/5+(4x+4)/15=2/5+(2x+7)/10-1/2

aducem la același numitor 30

=> 6(2x-4)+2(4x+4)=2×6+3(2x+7)-15×1

=> 12x-24+8x+8=12+6x+21-15

=> 20x-16=6x+18

=> 20x-6x=18+16

=> 14x=34

x=34/14

x=17/7