Question

Seven subtracted from 3 times a number is equal to 9 more than 5 times the number.

What is the number?

Answer 1

Let the number be x.

Then, 3 times a number = 3x

7 subtracted from it = (3x - 7)

3x - 7 = 5x + 9

Solve for x.

Answer 2

how

Answer 3

Move all terms containing x to the left side and the numbers to right side..

Answer 4

so 3x + 5x = -7 + 9?

Answer 5

8x = 2

Answer 6

+ becomes - when it moves across the equal sign

Answer 7

and - bcomes +

Answer 8

3x - 5x = 7 + 9

Answer 9

-2x = 16

Answer 10

yes... perfect.. so x = -8

:)

Answer 11

thanks :)

Answer 12

yw :)