(1)4x-1.2=10.8-4x (2)1.2x+8.5=5x-1 (3)1.8-2.4x=8x-0.72速喥
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(1)4x-1.2=10.8-4x(2)1.2x+8.5=5x-1(3)1.8-2.4x=8x-0.72速喥(1)4x-1.2=10.8-4x(2)1.2x+8.5=5x-1(3)1.8-2.4x=8
(1)4x-1.2=10.8-4x (2)1.2x+8.5=5x-1 (3)1.8-2.4x=8x-0.72速喥
(1)4x-1.2=10.8-4x (2)1.2x+8.5=5x-1 (3)1.8-2.4x=8x-0.72速喥
(1)4x-1.2=10.8-4x (2)1.2x+8.5=5x-1 (3)1.8-2.4x=8x-0.72速喥
(1)4x-1.2=10.8-4x
4x+4x=10.8+1.2
8x=12
x=12÷8
x=3/2
(2)1.2x+8. 5=5x-1
5x-1.2x=0.5+1
3.8x=1.5
x=1.5÷3.8
x=15/38
(3)1.8-2.4x=8x-0.72
8x+2.4x=1.8+0.72
10.4x=2.52
x=2.52÷10.4
x=63/260
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
(1)4x-1.2=10.8-4x (2)1.2x+8.5=5x-1 (3)1.8-2.4x=8x-0.72速喥
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