Toán Lớp 6: 5/3 + 1/3 .(x + 1/2) =4 x+1/10 + x+9/ 2 + x+2/9 = x+8/3 + x+7/4 + x+5/6 x+4/2000 +x +3/2001 +x +2/2002 + x+1 / 2003

Question

Toán Lớp 6:  5/3 + 1/3 .(x + 1/2) =4 x+1/10 + x+9/ 2 + x+2/9 = x+8/3 + x+7/4 + x+5/6 x+4/2000 +x +3/2001 +x +2/2002 + x+1 / 2003

tonhitruc · Answer

5/3 +  1/3 .(x + 1/2) =4               1/3. (x + 1/2) = 4 - 5/3               1/3 . (x + 1/2)= 7/3                        x + 1/2 = 7/3 : 1/3                        x + 1/2 = 7                        x           = 7 - 1/2                        x           = 13/2     Vậy x = 13/2     x+1/10 + x+9/ 2 + x+2/9 = x+8/3 + x+7/4 + x+5/6     x+1/10 +1+ x+9/ 2 +1+ x+2/9 +1 = x+8/3+1 + x+7/4+1 + x+5/6+1     x+1/10 + 10/10+ x+9/ 2 +2/2 + x+2/9 + 9/9 = x+8/3 + 3/3 + x+7/4 +4/4 + x+5/6 + 6/6     x+11/10 + x+11/ 2 + x+11/9  = x+11/3 + x+11/4 + x+11/6     x+11/10 + x+11/ 2 + x+11/9 - x+11/3 - x+11/4 - x+11/6 = 0     => (x+11).(1/10+1/2+1/9-1/3-1/4-1/6) =0     V&igrave; 1/10 + 1/2 + 1/9 - 1/3 - 1/4 - 1/6$ ne$ 0     => x + 11 = 0     => x         = 0 - 11     => x         = -11     Vậy x = - 11

thudan · Answer

Giải đáp+Lời giải và giải thích chi tiết:   5/3+1/3(x+1/2)=4   =>1/3(x+1/2)=4-5/3   =>1/3(x+1/2)=7/3   =>x+1/2=7   =>x=7-1/2=13/2   Vậy x=13/2.   (x+1)/10+(x+9)/2+(x+2)/9=(x+8)/3+(x+7)/4+(x+5)/6   =>(x+1)/10+1+(x+9)/2+1+(x+2)/9+1=(x+8)/3+1+(x+7)/4+1+(x+5)/6+1   =>(x+11)/10+(x+11)/2+(x+11)/9=(x+11)/3+(x+11)/4+(x+11)/6   =>(x+11)(1/10+1/2+1/9-1/3-1/4-1/6)=0   Do 1/10+1/2+1/9-1/3-1/4-1/6 ne 0   =>x+11=0   =>x=-11   Vậy x=-11.   C&acirc;u cuối thiếu đề.