Algebra 1 Section 3.1 Solve equations using addition and subtraction Consider the balance… Transformations that produce equivalent equations. 1.Add the.

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Presentation transcript:

Algebra 1 Section 3.1 Solve equations using addition and subtraction Consider the balance… Transformations that produce equivalent equations. 1.Add the same number to each side. 2.Subtract the same number from each side. 3.Simplify one or both sides. 4.Interchange the sides.

Solve x – 5 = -11 To solve an equation, isolate the variable by applying the inverse operation to both sides. Check the solution.

Describe the transformation you would use to solve and then solve and check the equation. x + 9 = = y - 6 x + 6 – 4 = -12 |-5| = z + 9

solve -w = – (-y) = 25 -r – (-7) = 16

A linear equation is an equation where the variable is raised to the 1 st power. Which are linear equations? X – 9 = n = 2n - 6 X = 9 |x-5| = 12

Write and solve an equation. The sum of a number and 14 is -78. The difference between a number and negative 14 is the sum of four and eleven.

assignment Page 135 Problems 14 – 40 even, 46,48,50,68,74