(1)x-[2/3]x=[1/6]
[1/3]x=[1/6]
[1/3]x÷
1
3=[1/6]÷
1
3
x=[1/2];
(2)4x-1.7=2.5
4x-1.7+1.7=2.5+1.7
4x=4.2
4x÷4=4.2÷4
x=1.05;
(3)13x-7.5x=27.5
5.5x=27.5
5.5x÷5.5=27.5÷5.5
x=5.
(1)x-[2/3]x=[1/6]
[1/3]x=[1/6]
[1/3]x÷
1
3=[1/6]÷
1
3
x=[1/2];
(2)4x-1.7=2.5
4x-1.7+1.7=2.5+1.7
4x=4.2
4x÷4=4.2÷4
x=1.05;
(3)13x-7.5x=27.5
5.5x=27.5
5.5x÷5.5=27.5÷5.5
x=5.