Toán Lớp 6: a(-5).x-2.x-13=29 b(-64): x +8=16 c (-2020) : (x -1)=1010 d 5.(x + 3 ) +23= -17 giúp mk vs các bn
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Toán Lớp 6: a(-5).x-2.x-13=29 b(-64): x +8=16 c (-2020) : (x -1)=1010 d 5.(x + 3 ) +23= -17 giúp mk vs các bn
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Giải đáp + Lời giải và giải thích chi tiết:
a)(-5).x-2.x-13=29$\\$<=>(-5).x-2.x=29+13$\\$<=>(-5).x-2.x=42$\\$<=>x.[(-5)-2]=42$\\$<=>x.(-7)=42$\\$<=>x=42:(-7)$\\$<=>x=-6
Vậy x=-6$\\$b)(-64): x +8=16$\\$<=>(-64):x=16-8$\\$<=>(-64):x=8$\\$<=>x=(-64):8$\\$<=>x=-8
Vậy x=-8$\\$c) (-2020) : (x -1)=1010$\\$<=>x-1=(-2020):1010$\\$<=>x-1=-2$\\$<=>x=(-2)+1$\\$<=>x=-1
Vậy x=-1$\\$d) 5.(x + 3 ) +23= -17$\\$<=>5*(x+3)=(-17)-23$\\$<=>5*(x+3)=-40$\\$<=>x+3=(-40):5$\\$<=>x+3=-8$\\$<=>x=(-8)-3$\\$<=>x=-11
Vậy x=-11
a) -5. x – 2. x – 13 = 29
=> (-5 – 2). x – 13 = 29
=> ( -7). x – 13 = 29
=> (-7).x = 29 + 13
=> (-7). x = 42
=> x = 42 : ( – 7)
=> x = -6
Vậy : x = -6
b) ( – 64) : x + 8 = 16
=> ( – 64) : x = 16 – 8
=> ( – 64) : x = 8
=> x = ( – 64) : 8
=> x = -8
Vậy : x = -8
c) ( – 2020) : ( x – 1) = 1010
=> x – 1 = -2020 : 1000
=> x – 1 = -2
=> x = -2 + 1
=> x = -1
Vậy : x = -1
c) 5. ( x + 3) + 23 = – 17
=> 5. ( x + 3) = – 17 – 23
=> 5. ( x + 3) = – 40
=> x + 3 = -40 : 5
=> x + 3 = -8
=> x = -8 – 3
=> x = -11
Vậy : x = -11