My kid is stuck with this equation can anyone help?
Need the full working:

-12x=3(y-3)

Don't normally do homework on this site, but I struggled with this in school. So... in order to simplify (remove the brackets) what you need to do is multiply each term (value) that is inside the brackets by 3. You should end up with 3y (3 multiplied by y) and 9 (3 multiplied by 3) so,

-12x = 3y-9

Quote:

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Originally Posted by colbtech

Don't normally do homework on this site, but I struggled with this in school. So...in order to simplify (remove the brackets) what you need to do is multiply each term (value) that is inside the brackets by 3. You should end up with 3y (3 multiplied by y) and 9 (3 multiplied by 3) so,

-12x = 3y-9

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Thanks for your help - it hopefully will make sense now

I take it you want the equation in y = mx + b format?
-12x = 3 * (y - 3)= 3y - 9
Add 9 to BOTH sides of the equation:
-12x + 9 = 3y - 9 + 9
The 9's on the right, cancel out:
-12x + 9 = 3y
Divide BOTH sides of the equation by 3:
(-12/3)x + (9/3) = (3/3)y
Simplifying the above:
-4x + 3 = y
or, y = -4x + 3. Good luck!

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