Question

dau coroana la primul care ma ajuta!​

Answer 1

Explicație pas cu pas:

a) (X x3+47)- 315= 146

(3x+47)= 146+315

(3×+47)= 461

3x= 461-47

3x= 414

x= 414:3

x= 138

b) (x:6 -528) +307=517

(x:6 -528) =517-307

x:6=210+528

×:6=738

x= 738x6

×= 4428

c) (x:3-3)×9=306

(x:3-3)= 306:9

(×:3-3)= 34

x:3= 34+3

x:3= 37

x= 37x3

x= 111

d) (x:2)×3=30×3

(x:2)×3= 90

x:2=90:3

×:2=30

x= 30x2

x= 60

e)

(7x9-X×5)-27:9=20

(63-5x)-3=20

63-5x=20+3

63-5x=23

5x= 63-23

5x= 40

x= 40:5

x=8