Question

ex 5 ......va rog frumos ..... îmi trebuie urgent ♡♡♡♡ COROANA♡♡♡

Answer 1

a)x-1/2+x+3/3=5/12⇒3x-3+2x+6/6=5/12⇒5x+3/6=5/12⇒12(5x+3)=30⇒
30x+36=30⇒30x=-36+30⇒30x=-6⇒x=-6/30⇒x=0.2
b)2x/3-x-1/4=5/10⇒8x-3x+3/12=5/10⇒5x+3/12=5/10⇒10(5x+3)=60⇒50x+30=60⇒50x=60-30⇒50x=30⇒x=30/50⇒x=3/5⇒x=0.6

c)-4x-1/10-x=8x/15⇒-4x+1+10x/10=8x/15⇒6x-1/10=8x/15⇒15(6x-1)=80x⇒90x-15=80x⇒80x-90x=-15⇒-10x=-15⇒x=-15/10⇒3/2⇒x=1.5

d)5x-5/3+x-1/2=4x-4⇒10x-10+3x-3/6=4x-4⇒13x-13=6(4x-4)⇒13x-13=24x-24⇒13x-24x=13-24⇒-11x=-11⇒x=-11/-11⇒x=1

e)1.5-x-1/4=x/2+5x-10/4⇒6-x-1/4=2x+5x-10/4⇒5-x/4=7x-10/4⇒4(5-x)=4(7x-10)⇒20x-4=28x-40⇒20x-28x=4-40⇒-8x=-36⇒x=-36/-8⇒x=-9/-2⇒x=4.5
sucees
6)x(x-2)=x²+1⇒x²-2x-x²-1=0⇒-2x-1=0⇒-2x=1⇒x=-1/2⇒x=-0.5

b)(x-1)(x-3)=x²+3x⇒x²-4x+3=x²+3x⇒-7x=-3⇒x=-3/7⇒x=-0.4

c)(3x-1)(3x+1)=9x²-x⇒9x²+3x-3x-1=9x²-x⇒9x²-9x²-1-x⇒-x=1⇒x=-1

d)(4x-3)x=(-2x+0.5)²=4x²-3x==4x²+3⇒4x²-4x²=3x+3⇒3x=-3⇒x=-1

sucees