Question

2X+4（8-X）=20 10X-6（10-X）=36 10X-6（16-X）=64 0.5X+0.1（8-X）=2 4？

Answer 1

2X+4（8-X）=20
2x+32-4x=20
-2x+12=0
x=6
10X-6（10-X）=36
10x-60+6x=36
16x=96
x=6
10X-6（16-X）=64
10x-96+6x=64
16x=160
x=10
0.5X+0.1（8-X）=2
0.5x+0.8-0.1x=2
0.4x=1.2
x=3
4X-2（8-X）=14
4x-16+2x=14
2x=30
x=15,6,1. 2x-4x+32=20 2x=12 x=6
2. 10x-60+6x=36 16x=96 x=6
3. 10x-96+6x=64 16x=160 x=10
4. 先都乘上10 5x+8-x=20 4x=12 x=3
5. 4x-16+2x=14 6x=30 x=5,1,2x+32-4x=20
4x-2x=32-20
2x=12
x=6,1,1.2x+32-4x=20
4x-2x=32-20
2x=12
x=6
2.10x-60+6x=36
16x=96
x=6,0,2X+4（8-X）=20 10X-6（10-X）=36 10X-6（16-X）=64 0.5X+0.1（8-X）=2 4X-2（8-X）=14
用移项解方程