Question

(5² x X +175):5+30=420 + 65 x 4                      Tìm x

Answer 1

(5^2.x+175):5+30=420+260

<=>(5^2.x+175):5=650

<=>5^2.x+175=3250

<=>25.x=3075

<=>x=123

Answer 2

( 5² . x + 175 ) : 5 + 30 = 420 + 65 . 4

= ( 25 . x + 175 ) : 5 + 30 = 420 + 260

( 25 . x + 175 ) : 5 + 30 = 680

( 25 . x + 175 ) : 5 = 680 - 30

( 25 . x + 175 ) : 5 = 650

25 . x + 175 = 650 . 5

25 . x + 175 = 3250

25 . x = 3250 - 175

25 . x = 3075

x = 3075 : 25

x = 123

Answer 3

(5^2 x X +175):5 +30 =420 + 65x4

=> (25 x X +175):5 +30= 680

=>(25 x X +175):5 = 650

=>25 x X +175=3250

=>25x X= 3075

=>X=123

Vậy x = 123