Algebra Expressions and Variables

If x = 4, find the value of the expression x + 5.

If y = 5, find the value of the expression 4y.

If y = 6, find the value of the expression 12 - y.

If y = 6, find the value of the expression 3y - 2.

If a = 4, find the value of the expression 2a + 7.

If m = 8, find the value of the expression 2m x 4.

If p = 6 and q = 3, find the value of the expression 5p ÷ q.

If r = 8 and s = 2, find the value of the expression r² - s²

Evaluate each expression if m = 2 and n = 4.

m + m

Evaluate each expression if m = 2 and n = 4.

n - m