What is the difference between an expression and equation?

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Presentation transcript:

What is the difference between an expression and equation? What’s the Difference? What is the difference between an expression and equation?

Coefficient Identify the coefficients in the expressions: 5 + 5mn + 11mn 6x + 9 + 2x + 7 + x

Write the Expression The sum of a number and 12

Simplify 8n – 4n² + 8n - 10

Distributive Property 4(3x + 2)

Substitution 5x + 10; if x = 10

One-Step Equations X + 27 = 276

Two-Step Equation 6x + 6 = 36

Word Problem At a restaurant, Mike and his three friends decided to divide the bill evenly. If each person paid $13 then what was the total bill?

The quotient of a number and 3 Write the Expression The quotient of a number and 3

Simplify 3m² + 4m – 2m + 3m²

Distributive Property 3(x² + 3x + 4)

Substitution 4x – 20; if x is -5

One-Step Equation X ÷ 9 = 13

Two-Step Equation -4x + 15 = 47

How many boxes of envelopes can you buy with $12 if one box costs $3? Word Problem How many boxes of envelopes can you buy with $12 if one box costs $3?

The product of a 4 and a number. Write the Expression The product of a 4 and a number.

Simplify 7x + 4x + 6y + x – 9y

Distributive Property -4(8x + 20)

Substitution 42/x + 5y; if x is 6 and y is 3

One-Step Equation 11x = 154

Two-Step Equation n/10 – 12 = 58

Word Problem You bought a magazine for $5 and four erasers. You spent a total of $25. How much did each eraser cost?

Write the expression 20 decreased by a number.

Distributive Property -6(4x – 6)

Substitution 25 – 8x + 18; if x is 3

One-Step Equation n – 21 = -44

Three-Step Equation 3(2x + 3) = 81

Word Problem 331 students went on a field trip. Six buses were filled and 7 students went in a van. How many students were in each bus?

Write the Expression 8 less than a number

Factoring Out 21x + 35

Factoring Out 5b - 25

Factoring Out 18n + 45

Variable on Each Side 2n = 4n - 16

Variable on Each Side 7m – 5 = 6m + 8

Variable on Each Side -2b – 9 = 6b + 15