Question

Tìm x biết
a)420+65.4=(x+175):5+30
b)x-4867=(175.2050.70):25+24

 

Answer 1

a) 420 + 65.4 = (x+175):5+30                          b) x - 4867 = (175.2050.70):25+23

(x+175):5+30 = 420 + 65.4                                 x - 4867 = 1004523

(x+175):5+30 = 680                                            x = 999656

(x+175):5 = 650

x+175 = 3250

x = 3075

Answer 2

a) 420 + 65.4 = ( x + 175 ) : 5 + 30

   420 + 260 = ( x + 175 ) : 5 + 30

    680 = ( x + 175 ) : 5 + 30

    680 - 30 = ( x + 175 ) : 5

    650 = ( x + 175 ) : 5

    650 . 5 = x + 175

     3250 = x + 175

     x = 3250 - 175

     x = 3075