Question

Calculati:
a)x+2=5*(24-x-2)
b)-21-x+3= -18-x
c)x+4=3*[-(12-x)]
d)x+3+x+10+x+7=x
e)x+8+x+x-20=96

Answer 1

Rezolvare
a)x+2=120-5x-10⇒x+5x=120-10-2⇒6x=108⇒x=108 supra 6⇒x=18
b)-18-x=10-x⇒-x+x=10+18⇒x=28
c)x+4=-36x-3x⇒x+4=-39x⇒4=-39x-x⇒4=-40x⇒x=-40 supra -4⇒x=10
d)3x+20=x⇒3x-x=-20⇒2x=-20⇒x=-20 supra -2⇒x=10
e)3x-12=96⇒3x=96+12⇒3x=108⇒x=108 supra 3⇒x=36