Using the "opposite operation" to "undo" and isolate the variable

when solving an equation is more commonly called applying the ...

I need to buy some cardboard to build a box 12 inches long, 8 inches wide and 10 inches high. How much cardboard is needed to build the box

Peter has 13 eggs. joe has 4 fewer eggs than peter. how many eggs does joe have

Heather is trying to decrease the amount of toys that Oliver has. Originally, he had 55 toys in his room and now he only has 30. By what percentage did Heather decrease the amount of toys?

An annual pass for the city bus costs $26. Paul and his three friends each bough an annual pass. How much money did they pay in all for the passes?

Mrs. Cox and Mr. Jones are in charge of the work-study program for Oak High School. Each teacher is in charge of supervising 10 students. They are comparing statistics for the two groups of students based on the hours worked per week.

Pete is jumping rope. He does 38 50 22 and 29 jumps. How many jumps does he do in all? Circle the correct answer. Jess chose a this is wrong how did jess get her answer

The regular price of a space invader game is 52, but its on sale. the discount is $13 What percent discount is this?

What is a-5-b a=10 b=4

Round to the nearest whole number 99.59

A salesman earns $3000.00 per week plus a 5% commission on all sales over $8000.00. one week his sales amounted to $15,000.00. What were his earnings that week?