Question

Sa se determine x din egalitatile :
a). x+1 supra 5 = 4 supra 2 .
b). 3 supra5 = 7x - 2 supra 20.
c). 5x - 2 supra 2x + 3 = 8 supra 7 .

Answer 1

x+1/5=4/2⇒x+1/5=2⇒x+1=2*5⇒x+1=10⇒x=10-1⇒x=9
b)3/5=7x-2/20⇒3/5=140x-2/20⇒5(140x-2)=20*3≡700x-10=60⇒700x=60+10⇒
700x=70⇒x=70/700=x=10/100=1/10
c)5x-2/2x+3=8/7⇒7(5x-2)=8(2x+3)⇒35x-10=16x+24⇒35x-16x=24+10⇒
19x=34⇒x=34/19
succes

Answer 2

(x+1)/5=4/2  rezulta(x+1)/5=2
x+1=2x5 rezulta x=9