Đáp án:
Giải thích các bước giải:
a, 27/8-(x÷2)=5/8 c, 2/21×7/4-(x-5/3)÷1/2=5/6
x÷2=27/8-5/8=11/4 1/6-(x-5/3)÷1/2=5/6
x=11/4×2=11/2 (x-5/3)÷1/2=1/6-5/6=-2/3
x-5/3=-2/3×1/2=-1/3
b 3(x-1)-25/169=144/169 x=-1/3+5/3=4/3
3(x-1)=144/169+25/169=1
x-1 =1/3 d, 3/4 +1/4|4+3x|=19/8
x=1/3+1=4/3 1/4|4+3x|=19/8-3/4=13/8
|4+3x|=13/8÷1/4=13/2
+,Nếu 4+3x =13/2 +,Nếu 4+3x=-13/2
x=5/6 x=-7/2