Equivalent Expressions When two expressions are equivalent, they always have the same value. These are some examples of expressions. An expression is a mathematical statement that uses numbers, operations, letters, or a combination of all three. 4 8 + 1 d - 7 When two or more expressions are equivalent, they have the same value. 4+2+ 6 and 5+7 are equivalent expressions because they are both equal to 12. 5x and 5.xare also equivalent. Check Your Understanding Attempt 1 of 2 Match the equivalent expressions. 100 - 88 ? 12 7+9-1 ? 3x 3.X ? 13 5+3+5 ? 15 HINT SUBMIT