Warm-Up Question

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The value of z is 4.

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What is an equation?

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An equation is a mathematical statement that asserts the equality of two expressions.

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What does it mean to solve an equation?

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To solve an equation means to find the value(s) of the variable(s) that make the equation true.

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What is a variable in mathematics?

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A variable is a symbol used to represent an unknown value in an equation or expression.

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The first step is to isolate the variable z by subtracting 6 from both sides.

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The value of x is 4.

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What is the purpose of using equations in mathematics?

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Equations are used to model relationships between quantities and to solve problems.

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What does it mean to isolate a variable?

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To isolate a variable means to manipulate the equation so that the variable is on one side by itself.

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The value of y is 15.

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The solution is z = 4.