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What is the inverse of adding 7?
Subtract 7
x + 5 = 12 → What is the first step?
subtract 5
x + 6 = 14
8
x + 4 = 10 → x = 6 (Correct or Incorrect?)
Correct
3(x + 4)
Yes
3x+12
What is the inverse of multiplying by 4?
divide by 4
3x = 18 → What is the first step?
divide by 3
4x = 20
5
3x = 15
x = 3
Incorrect
answer is 15/3=5
x + 4
Not distributive
What undoes division by 6?
Multiply by 6
x – 4 = 9 → First step?
add 4
x – 8 = 3
11
x – 7 = 12
x = 19
Correct
5(x – 2)
Yes
Bonus points for simplified correct equation
What undoes subtracting 9?
adding 9
x ÷ 5 = 7 → First step?
multiply by 5
x ÷ 6 = 5
30
x ÷ 4 = 8
x = 2
Incorrect
Bonus points for the correct answer!!
7x + 2
Not distributive
What is the inverse of multiplying by ½?
dividing by 1/2
x + 9 = 2 → First step?
Subtract 9
7x = 49
7
5x = 25
x = 30
Incorrect
Bonus points for correct answer
2(x + x)
Yes
Bonus points for simplified equation
triple points for final equation.