(6)1/2(x-1)-1/5(x+2)=1/3x-1(7)3[5x-4(2-x)]-7=5(8)1/3[1/4(1/5x-1)-6]+4=2(9)3/4[4/3(1/2x-1)+8]=3/2x+1
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(6)1/2(x-1)-1/5(x+2)=1/3x-1(7)3[5x-4(2-x)]-7=5(8)1/3[1/4(1/5x-1)-6]+4=2(9)3/4[4/3(1/2x-1)+8]=3/2x+1(
(6)1/2(x-1)-1/5(x+2)=1/3x-1(7)3[5x-4(2-x)]-7=5(8)1/3[1/4(1/5x-1)-6]+4=2(9)3/4[4/3(1/2x-1)+8]=3/2x+1
(6)1/2(x-1)-1/5(x+2)=1/3x-1
(7)3[5x-4(2-x)]-7=5
(8)1/3[1/4(1/5x-1)-6]+4=2
(9)3/4[4/3(1/2x-1)+8]=3/2x+1
(6)1/2(x-1)-1/5(x+2)=1/3x-1(7)3[5x-4(2-x)]-7=5(8)1/3[1/4(1/5x-1)-6]+4=2(9)3/4[4/3(1/2x-1)+8]=3/2x+1
(6)1/2(x-1)-1/5(x+2)=1/3x-1
解 两边乘以30得15(x-1)-6(x+2)=10x-30,
15x-15-6x-12=10x-30,
x=3.
(7)3[5x-4(2-x)]-7=5
解3[5x-8+4x]=12,
9x-8=4,
9x=12,
x=4/3.
(8)1/3[1/4(1/5x-1)-6]+4=2
解 (1/4)(x/5-1)-6+12=6,
(1/4)(x/5-1)=0,
x/5=1,
x=5.
(9)(3/4)[(4/3)(x/2-1)+8]=(3/2)x+1,
解 x/2-1+6=(3/2)x+1,
x=4.
解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
*-----------------------------------------------*| 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 ||
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