What does it mean for a variable to have coefficients that are equal but opposite

If you double a number and then add 32, the result is 80. what is the number?

I borrow $600 for 5 weeks. The amount of interest I pay is $20 per $100 borrowed. What is the APR at which you are borrowing money?

Use a proportion to answer the question What number is 35% of 18

16 - 2r = - 3r + 6r + 1

A 3-pound tub of butter at n dollars per pound costs $3.85. 3n = 3.85 3 - n = 3.85 3 + n = 3.85 3/n = 3.85

Solve the equation for y: - 8x + 4y = 20

Use an equation to solve. 20% of what number is 47? A. 236.5 B. 232 C. 237.5 D. 235

Decompose the number 80

Darrell has $1,990 saved and wants to buy a motorcycle. He earns $10 per hour and he works for 39 hours. Estimate how much money, Darrell has left after buying a $2,200 motorcycle.

Which type of triangle will always have exactly 1-fold reflectional symmetry?