Question

Cine ma ajuta la exercițiul asta?

Answer 1

a)7x-8=15; 7x=15-8; x=1
b)1/2-1/5 x=1/3;15/30-6/30 x=10/3; (15-10)30= 6x/30; 5=6x; x=5/6
c) x:2/5-1/3=2; 5x/2-1/3=2; 15x=12+2; x=14/15
d)1/4x+1/8=2  1/8; 1/4x+1/8=17/8; 2/8x=16/8; x=8
e)4 1/2 x-1/2=17/2; 9/2 x=16/2; 9x=16; x=16/9
f)) x:2/3 -1/4=3/4; 3x/2= 2/4; 3x=1; x= 1/3