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y = 5(x + 2)

 

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

 

thanks

 Jan 28, 2018

Best Answer 

 #1
avatar
+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.

 Jan 28, 2018
edited by Guest  Jan 28, 2018
edited by Guest  Jan 28, 2018
edited by Guest  Jan 29, 2018
 #1
avatar
+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

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