Question

determine whether each statement is an expression or an equation.
$2x + 1 + x$
$5 = 3 - 2x$
$10x + 7 = 27$
$\frac{7x}{15}$
for each (a, b, c, d), choose between expression and equation.

Explanation:

An expression is a combination of numbers, variables, and operations with no equality sign. An equation is a mathematical statement that sets two expressions equal, containing an $=$ sign.

• $2x+1+x$ has no equality sign, so it is an expression.
• $5=3-2x$ has an equality sign, so it is an equation.
• $10x+7=27$ has an equality sign, so it is an equation.
• $\frac{7x}{15}$ has no equality sign, so it is an expression.

Answer:

a. Expression
b. Equation
c. Equation
d. Expression