Solving a Linear Equation In Exercises 5-12, solve the equation and check your solution. (If not possible, explain why.) 5. x + 11 = 15 6. 7 - x = 19 7. 7- 2x = 25 8. 7x + 2 = 23 9. 3x – 5 = 2x + 7 10. 4y + 2 – 5y = 7 – 6y 11. x - 3(2x + 3) = 8 – 5x 12. 9x – 10 = 5x + 2(2x – 5)

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.