(−8* y^2−9*y)+(8*y^3+9*y^2−2*y) first, remove extraneous parentheses (or distribute if negative) =−8* y^2−9*y+8*y^3+9*y^2−2*y then group terms in decreasing degree of y (variable) =+8*y^3 −8* y^2+9*y^2 −9*y−2*y simply expression by adding/subtracting similar terms =+8*y^3 +y^2 −11*y to give the final answer.
To solve divide both sides by 4 to cancel out the 4 on the x side to get x alone. Then just do -10/4. That gives you 2.5 so (X=2.5). Hope I helped and have a great day and night
