It is an expression.
It is equivalent to: 2x^2 +31x -16
4
3x + 5 + x + 10 + 2y 4x + 2y + 15 |:2 2x + y + 7.5 2x + y + 7.5 is equivalent to the original.
The expression ( 2(x + 4) ) can be simplified by distributing the 2. This results in ( 2x + 8 ). Thus, ( 2(x + 4) ) is equivalent to ( 2x + 8 ).
2x+7=3 is an equation. However, 2x=-4 is equivalent. So is x=-2. And an infinite number of others.
2x + x + 4 +2x = x + 20 5x + 4 = x + 20 5x - x = 20 - 4 4x = 16 x = 4
x + 2x + 6x = 9x
6x with 3 over the x, because that is how many x's there are.
X=7
x plus 2 = x + 2 x plus x = 2x
x=1
5x + x - 6x + 2x = 2x