解出下列方程3x+6x=816x-2x=3.62.5x-2.4x=820.2x+0.27=51.76.98-x=6.73.5x+x=22.532÷4x=48×2.5-2x=13.64×（x+1）=6x-0.72x=0.0840.5×3+4x=9.57x=3x+190.4x-0.8=227x÷6=0.93.6x-1.8x=3.64x+x=403.6x-0.9x=5.43.4x+48=65

Question

解出下列方程
3x+6x=81
6x-2x=3.6
2.5x-2.4x=82
0.2x+0.27=51.7
6.98-x=6.7
3.5x+x=22.5
32÷4x=4
8×2.5-2x=13.6
4×（x+1）=6
x-0.72x=0.084
0.5×3+4x=9.5
7x=3x+19
0.4x-0.8=2
27x÷6=0.9
3.6x-1.8x=3.6
4x+x=40
3.6x-0.9x=5.4
3.4x+48=65

Answer 1

(1)3x+6x=81
9x=81
x=9
(2)6x-2x=3.6
4x=3.6
x=0.9
(3)2.5x-2.4x=82
0.1x=82
x=820
(4)0.2x+0.27=51.7
0.2x=51.7-0.27
0.2x=51.43
x=257.15
(5）6.98-x=6.7
-x=6.7-6.98
-x=-0.28
x=0.28
（7）3.5x+x=22.5
4.5x=22.5
x=5
（8）32除以4x=4
8x=4
x=1/2
（9）8×2.5-2x=13.6
20-2x=13.6
-2x=-6.4
x=3.2
（10）4×(x+1)=6
4x+4=6
4x=2
x=1/2
（11）x-0.72x=0.084
0.02x=0.084
x=4.2
（12)0.5×3+4x=9.5
1.5+4x=9.5
4x=8
x=2
（13）7x=3x+19
7x-3x=19]
6x=19
x=19/6
（14）0.4x-0.8=2
0.4x=2.8
x=7
(15)27x除以6=0.9
27/6x=0.9
x=3/15
(16)3.6x-1.8x=3.6
1.8x=3.6
x=2
(17)4x+x=40
5x=40
x=8
(18)3.6x-0.9x=5.4
2.7x=5.4
x=2
(19)3.4x+48=65
3.4x=17
x=5