y = 5(x + 2)

to make x the subject do I need to multiply out the brackets first?

thanks

Walthamx
Jan 28, 2018

#1**+1 **

y = 5(x + 2)

y = 5x + 10 subtract 10 from both sides

y - 10 = 5x divide both sides by 5

[y - 10] / 5 =x, or:

**x = [y - 10] / 5**

You could also do this:

y = 5(x + 2) divide both sides by 5

y/5 = x + 2 subtract 2 from both sides

y/5 - 2 = x, or:

**x =y/5 - 2 Note: Even though they look different, but in fact they are exactly the same.**

Guest Jan 28, 2018

edited by
Guest
Jan 28, 2018

edited by Guest Jan 28, 2018

edited by Guest Jan 29, 2018

edited by Guest Jan 28, 2018

edited by Guest Jan 29, 2018

#1**+1 **

Best Answer

y = 5(x + 2)

y = 5x + 10 subtract 10 from both sides

y - 10 = 5x divide both sides by 5

[y - 10] / 5 =x, or:

**x = [y - 10] / 5**

You could also do this:

y = 5(x + 2) divide both sides by 5

y/5 = x + 2 subtract 2 from both sides

y/5 - 2 = x, or:

**x =y/5 - 2 Note: Even though they look different, but in fact they are exactly the same.**

Guest Jan 28, 2018

edited by
Guest
Jan 28, 2018

edited by Guest Jan 28, 2018

edited by Guest Jan 29, 2018

edited by Guest Jan 28, 2018

edited by Guest Jan 29, 2018