解方程0.7X+1/0.4-0.2X-1/.07=1

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解方程0.7X+1/0.4-0.2X-1/.07=1解方程0.7X+1/0.4-0.2X-1/.07=1解方程0.7X+1/0.4-0.2X-1/.07=10.7X+1/0.4-0.2X-1/.07=

解方程0.7X+1/0.4-0.2X-1/.07=1
解方程0.7X+1/0.4-0.2X-1/.07=1

解方程0.7X+1/0.4-0.2X-1/.07=1
0.7X+1/0.4-0.2X-1/.07=1
0.5X+10/4-10/7=1
0.5X=1-10/4+10/7
0.5X=-1/14
X=-1/7

0.7x+1/0.4-0.2x-1/0.7=1
0.7x-0.2x=1-1/0.4+1/0.7
0.5x=1-2.5+10/7=-1/14
x=-1/7

0.5x=1-1/0.4+1/0.7=-1/14
x=-1/7

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