Question

a)   (7x – 15).8 – 21 = 27

thank 

Answer 1

(7x - 15) = 27+21

(7x - 15)= 48

7x= 48+15

7x= 63

x= 63:7

x= 9

Answer 2

56x -120 -21 =27

56x                = 27+210 +21

56x                = 168

x                    = 3

Answer 3

\(\left(7x-15\right).8-21=27.\Leftrightarrow\left(7x-15\right).8=48.\Leftrightarrow7x-15=6.\Leftrightarrow x=3.\)

Answer 4

\(\left(7x-15\right).8-21=27\\ \left(7x-15\right).8=27+21\\ \left(7x-15\right).8=48\\ \left(7x-15\right)=48:8\\ \left(7x-15\right)=6\\ 7x=6+15\\ 7x=21\\ x=21:7\\x=3 \)

Answer 5

(7x - 15) = 27+21

(7x - 15)= 48

7x= 48+15

7x= 63

x= 63:7

x= 9

Answer 6

(7x-15).8-21=27

(7x-15).8=27+21

(7x-15).8=48

7x-15=48:8

7x-15=6

7x=6+15

7x=21

x=21:7

x=3