Question

Aflați numărul x: 4x(x-5)-14=50, [12:3×(3x+1)]=24,[(3-2)x5-1]:2+5=7.plz repedeeeee
Dau coroana​

Answer 1

x:4x(x-5) -14=50=>1/4(x-5)-14=50=>x-5/4-14=50=>

x-5-56=200=>x=200+61=>x=261

[12:3•(3x+1)]=24=>12:(9x+3)=24=>4/3x+4=24=>4/3x=20=>

4=3x•20=>60x=4=>x=1/15

[(3-2)x•5-1]:2+5=7

(5x-1):2+5=7

5x/2-1/2+5=7

5x-1/2=2

5x=4+1/2

5x=5/2

x=5/2:5=5/2•1/5=>x=2