Question

решить уравнения:(15u-21)*3+27=234; (36t+98):14=25; (12v+30v+42):6=21

Answer 1

(15u-21)*3+27=234

(15u-21)*3=234-27

(15u-21)*3=207

(15u-21)=207:3

(15u-21)=69

15u=69+21

15u=90

u=90:15

u=6

 

(36t+98):14=25

(36t+98)=25*14

(36t+98)=350

36t=350-98

36t=252

t=252:36

t=7

 

(12v+30v+42):6=21

42v+42=21*6

42v+42=126

42v=126-42

42v=84

v=84:42

v=2