Question

1) 2(x-1)-9=4-x; x€ R
2) 5x-1/2-(2x+1)=x-1/4 ; x€ - radical din 2,5,8,9

Answer 1

1)2x-2-9=4-x
2x-11=4-x
2x+x=4+11
3x=15
x=15/3
x=5

2)5x-1/2-2x-1=x-1/4
3x-x=1/2+1-1/4
2x=(2+4-1)/4
2x=5/4
2x·4=5
8x=5
x=5/8