-10y-3=7
Move the 3 to the other side
-10y=3+7
-10y = 10
Divide both by negative 10 and it equals -1 !
48-8=40 so you are left with 40 items for the smaller packs
Then 40 items/10 packs = 4 items in each
This word form is six hundred and thirty five million, six hundred and seventy nine thousand, and fourty two.
Answered it step by step with this picture, hope this helped you! Basically all triangles add up to 180 degrees so you add the two sides, subtract the combination of the sides by 180 and then divide by 4x to get to the answer. Makes a lot more sense on img