# Solve equations using addition and subtraction. https://www.youtube.com/watch?v=W7fPsSw74TM.

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Solve equations using addition and subtraction. https://www.youtube.com/watch?v=W7fPsSw74TM

1) Solve r + 16 = -7 Think of this equation as a balance scale. Whatever you do to one side has to be done to the other to keep it balanced!

1) Solve r + 16 = -7 To solve, you must get the variable by itself. What number is on the same side as r? 16 To get r by itself, we must undo the “add 16”. What is the opposite of adding 16? Subtracting 16

- 16 -16 r = -23 1) Solve r + 16 = -7 1.Draw a wall to separate the equation into 2 sides 2.Subtract 16 from both sides 3.Write your answer

2) Solve x + 2 = -3 Get the variable by itself. What is your first step? 1.Add 2 to both sides 2.Subtract 2 from both sides 3.Add 3 to both sides 4.Subtract 3 from both sides Answer Now

2) Solve x + 2 = -3 - 2 - 2 x = -5 1.Draw “the wall” to separate the equation into 2 sides 2.Subtract 2 from both sides 3.Write the answer

3) Solve 8 = m - 3 1.m = 5 2.m = 11 3.m = 24 4.m = 8/3 Answer Now

3) Solve 8 = m - 3 + 3+ 3 11= m

4) Solve y + -3 = 7 - -3 - -3 y = 10

5) Solve. x - -2 = 1 + -2 + -2 x = -1

Solve y – -3 = 7 1.y = 10 2.y = 4 3.y = -10 4.y = -4 Answer Now