Question

13) Solve : 4x +9= 45 and check your result.
14) Find the perim​

Answer 1

Answer:

13) 4x + 9 = 45

4x = 45 - 9 ( Bring the numbers to one side and the x terms to another side.)

4x = 36

x = 36/4

x = 9

( when bring the terms to another side, always change

their signs. for eg. the + 9 which was on the left side will

be - 9 on the right side

The 4 which was multiplied to x on the left side will be

divided by 36 on the right side)

Answer 2

4x+9 = 45

4x = 45-9

4x = 36

x = 36/4

x = 9

the answer is x = 9.

prove

x = 9

4x+9 = 45

4×9+9 = 45

36+9 = 45

45 = 45

proved

hope it helps