3y^2+12y−21/3y
What do you want done with this one?
.
5(4x−6+x^3)+5x(9−2x^2)
What do you want done with this one? Expand it?
20x - 30 + 5x^3 + 45x - 10x^3
-5x^3 + 65x - 30
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3x − 5 = 3 + 5x
What do you want done with this one? Solve for x?
3x - 5x - 5 = 3 + 5x - 5x
-2x - 5 = 3
-2x - 5 + 5 = 3 + 5
-2x = 8
-2x/(-2) = 8/(-2)
x = -4
.
2(x − 9) = 6 + x/2
What do you want done with this one? Solve for x?
2x - 18 = 6 + x/2
multiply everything by 2 on both sides
4x - 36 = 6 + x
3x - 36 = 6
3x = 42
x = 14