Adding and Subtracting One-Step Equations Word Problems

What is the first step in solving the following problem?

• Add 10 to each side

• Divide by 2

• Subtract 10 from each side

• Multiply by 10

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

• They should have divided by 1 for the last step

• They should add 19 instead of subtracting 19

• I can not find an error

• Instead of adding 3k they should subtract 3k

What is the inverse of adding?

• Dividing

• Multiplying

• Adding

• Subtracting

decreased by is what operation?

• addition

• subtraction

• multiplication

• division

Tyrell has saved $62 to buy a new phone. How many more dollars must Tyrell save if the cost of the phone is $89? Let d be the number of dollars Tyrell must still save?

• 62 + d = 89

• 62d = 89

• d ÷ 89 = 62

• d - 62 = 89

s + 42 = 75

• 33

• 117

• 36

• 43

Solve for x
17 = x + 3

• x = 20

• x = 14

• x = 13

• x = 19

what equation matches the situation?
Rob had some video games then he bought 4 more. Now he has a total of 10 games.

• v-4=10

• 10-4=v

• v+4=10

• 4v=10

x + 40 = 120

• 90

• 80

• 70

• 81

x+5.5=10.8

• 5

• 5.3

• 16.8

• 100