Question

identify each as an equation or and expression 3x + 1 = -21 x = 2x + 5 21 multiply - 13 + 11x - 3.7 x - 13 1/2 x equals 5 + 3 1/2× + 5

Answer 1

$3x+1=-21x=2x+5_{\text{ }}(Equation)$$-13+11x-3.7x_{\text{ }}(Expresssion)$$x-13\frac{1}{2}x=5+3\frac{1}{2}x+5_{\text{ }}(Equation)$

An expression can be evaluated, while an equation can be solved. An expression is basically an incomplete mathematical equation. It cannot have an answer or solution.