Check Solutions for Equations

Which is the solution to

255 = 17h

• h = 15

• h = 4,335

• h = 238

• h = 12

Which is the solution to x + 125 = 375.

• x = 3

• x = 250

• x = 500

• x = 475

x - 32 = 49

• x = 17

• x = 71

• x = 81

• x = 49

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

When I solve for x , I can check if my answer is correct by ....

• pluging the answer I got for x into the equation to see if it makes it true

• to make sure that I get it right on the test

• to be able to go to Taco Bell and order a burrito with hot sauce

• to impress all the kids around me that I might know a little algebra

How do you prove that your solution is correct? What is your success criteria for solving equations?

• I don't need to check: it's probably right!

• Substitution: plug the solution in for x and verify that the number sentence is true.

How do you check the solution for the equation x + 8 = 3 if the solution is x = -5?

• Substitute -5 for x and verify that -5 + 8 = 3

• Substitute -5 for x and verify that -5 + 8 = 11

• Substitute 3 for x and verify that 3 + 8 = 3

• Substitute 3 for x and verify that 3 + 8 = 11

Answer explanation

The correct choice is to substitute -5 for x and verify that -5 + 8 = 3

The solution to the equation a - 10 = -4 is 6. To check to see if your solution works you _________________the variable with the solution that you found and then verify that the left side is equal to the right.

• multiply

• replace

• subtract

• add

One way to be certain of your work and having the correct solution is to what?

• Isolate the variable

• Inverse operations

• Opposite

• Check your solution

To check your solution. You do what first?

• Isolate the variable

• Opposite

• Substitute the variable with the answer

• Use the "Golden Rule"