Hey there!!
They're called Inverse operation. Such as *multiplication and division* and *addition and subtraction*
Hope this helps. c:
$2x + $1.5y = 12 packages
$2(4) + $1.5(8)
$8+$12 = 12 packages
$20 for 12 packages if you buy 4 packages of hamburger buns, and 8 packages of hot dog buns
-7.8,-5.6,-1.25,9
Hope this helped!! :)
Is this it? Not sure...
-3 (x - 3/2)^2 + 79/4
