3x^2
4X
x+7
x+y
There is NO solution, because there is NO equals sign. However, 5x + 3x add to 8x (simplified) Remember in Algebra 5x means '5' multiplied to 'x' and '3' multiplied to 'x'. The multiplication sign is never shown in algebra.
2 multiplied by x multiplied by y This problem cannot be solves because you do not know the values of x and y.
4x plus 7
It is a quadratic expression that can be multiplied out to: x^2 +6x+8
-50
algebra
If: 12 = x+6 Then: x = 6
x = 7
It depends what x is. If you do not know the value of either variable it would be 2x.