Question

Tìm x, biết

a) 575 – (6X + 70) = 445                        

b) (32.15) : 2 = (X +70) : 14 – 40

c) (X – 15) -75 = 0                                             d) 420 + 65.4 = (X + 175):5 +30

e) X – 4867 = (175.2050.70) : 25 + 23              f) [(X + 32) -17].2 = 42

g) 96 – 3.(X+1)=42                                            h) 165 – 19.(35 : X + 3) = 13

 

Answer 1

\(a,\Rightarrow6x+70=130\Rightarrow6x=60\Rightarrow x=10\\ b,\Rightarrow240=\left(x+70\right):14-40\\ \Rightarrow\left(x+70\right):14=280\\ \Rightarrow x+70=3920\Rightarrow x=3850\\ c,\Rightarrow x-15=75\Rightarrow x=90\\ d,\Rightarrow\left(x+175\right):5=680-30=650\\ \Rightarrow x+175=3250\Rightarrow x=3075\\ e,\Rightarrow x-4867=1004523\Rightarrow x=1009390\\ f,\Rightarrow x+32-17=24\Rightarrow x=9\\ g,\Rightarrow3\left(x+1\right)=54\Rightarrow x+1=18\Rightarrow x=17\\ h,\Rightarrow19\left(35:x+3\right)=152\\ \Rightarrow35:x+3=8\Rightarrow35:x=11\Rightarrow x=\dfrac{35}{11}\)