Câu hỏi của Hà Vy

Question

60+x-34=43

X x 23 -6 x 23 + X x 69=230

(15x24-x):0,25=100 : 0,25

(7 x X + 8):5=10

280 : (7+3x X)=4

(X+5)x19:13=57

4x (36-4xX)=64

(7,6:1,9)x X =3,2

(X : 2 + 50) : 5= 12

X x 23 - 6 x 23 + X x 6...

Nguyễn Đức Trí · Accepted Answer

$60+x-34=43\Rightarrow x=43+34-60=17$

$23x-6.23+69x=230$

$\Rightarrow23x+69x=230+6.23$

$\Rightarrow92x=368\Rightarrow x=368:92\Rightarrow x=4$

$\left(15.24-x\right):0,25=100:0,25$

$\Rightarrow\left(360-x\right)=100:0,25.0,25$

$\Rightarrow360-x=100\Rightarrow x=360-100=260$

$\left(7x+8\right):5=10\Rightarrow\left(7x+8\right)=10.5$

$\Rightarrow7x+8=50\Rightarrow7x=50-8\Rightarrow7x=42\Rightarrow x=42:7=6$

$280:\left(7+3x\right)=4\Rightarrow\left(7+3x\right)=280:4$

$\Rightarrow7+3x=70\Rightarrow3x=70-7\Rightarrow3x=63\Rightarrow x=63:3=21$

$\left(x+5\right)x19:13=57$

$\Rightarrow\left(x+5\right)x19=57.13$

$\Rightarrow\left(x+5\right)=741:19\Rightarrow x+5=39\Rightarrow x=39-5=34$

$4\left(36-4x\right)=64$

$\Rightarrow\left(36-4x\right)=64:4$

$\Rightarrow36-4x=16$

$\Rightarrow4x=36-16\Rightarrow4x=20\Rightarrow x=20:4=5$

$\left(7,6:1,9\right)x=3,2$

$\Rightarrow4x=3,2\Rightarrow x=3,2:4=0,8$

$\left(x:2+50\right):5=12$

$\Rightarrow x:2+50=12.5$

$\Rightarrow x:2=60-50\Rightarrow x:2=10\Rightarrow x=10.2=20$Câu trả lời: $60+x-34=43\Rightarrow x=43+34-60=17$