What is a variable in algebra?
If x = 3, what is the value of 2x + 5?
Simplify: 3x + 2x
Solve: x + 7 = 12
Expand: 3(x + 4)
Solve: 2x = 10
If a = 2, what is a² + 3?
Simplify: 5y - 2y
Solve: x - 3 = 8
Expand: 2(3x + 1)
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