问题
解答题
(1)5x+9=34
(2)1.6x-1.2=10
(3)10x-2x+28=36
(4)6x-0.5×6=2.4.
答案
(1)5x+9=34,
5x+9-9=34-9,
5x÷5=25÷5,
x=5;
(2)1.6x-1.2=10,
1.6x-1.2+1.2=10+1.2,
1.6x÷1.6=11.2÷1.6,
x=7;
(3)10x-2x+28=36,
8x+28-28=36-28,
8x÷8=8÷8,
x=1;
(4)6x-0.5×6=2.4,
6x-3+3=2.4+3,
6x÷6=5.4÷6,
x=0.9.