Unit 4. Day 11.

Example A: Write an equation. Then solve the equation. Mr. Jordan wants to buy a used car that costs $8,750. If he has $4,200 saved already, and can save $175 each week, how many weeks will it take him to save the money for the car? 8750 4200 175 ∙ 𝑤 + = 4200+175𝑤=8750 −4200 −4200 175𝑤 = 4550 175 175 4550 175 2∙5∙5∙7∙13 5∙5∙7 𝑤 = = = 26 26 𝑤𝑒𝑒𝑘𝑠

Example A: Write an equation. Then solve the equation. Mr. Jordan wants to buy a used car that costs $8,750. If he has $4,200 saved already, and can save $175 each week, how many weeks will it take him to save the money for the car? 𝐶𝑜𝑛𝑠𝑡𝑎𝑛𝑡 𝑇𝑒𝑟𝑚 𝑉𝑎𝑟𝑖𝑎𝑏𝑙𝑒 𝑇𝑒𝑟𝑚 𝑇𝑜𝑡𝑎𝑙 4200 + 175𝑤 = 8750

Example B: Write an equation. Then solve the equation. Sam is trying to loose weight. Sam is currently 198 pounds. If she is dieting and exercising and can lose 4 pounds each month, how many months will it take her to get down to 140 pounds. 198 −4 ∙ 𝑚 140 = 198−4𝑚=140 −198 −198 −4𝑚 = −58 −4 −4 58 4 2∙29 2∙2 29 2 14 1 2 𝑚 = = = =

198 −4𝑚 =140 Example B: Write an equation. Then solve the equation. Sam is trying to loose weight. Sam is currently 198 pounds. If she is dieting and exercising and can lose 4 pounds each month, how many months will it take her to get down to 140 pounds. 𝐶𝑜𝑛𝑠𝑡𝑎𝑛𝑡 𝑇𝑒𝑟𝑚 𝑉𝑎𝑟𝑖𝑎𝑏𝑙𝑒 𝑇𝑒𝑟𝑚 𝑇𝑜𝑡𝑎𝑙 198 −4𝑚 =140

Example C: Write an equation. Then solve the equation. Ms. Ritter grew up on a small farm in S. Indiana. When she was in 7th grade, her allowance depended on how much produce she helped sell. Her allowance was $5, but she received an extra $2 for every melon she sold. If her allowance last week was $ 29, how many melons did she sell? 5 2 ∙ 𝑚 29 + = 5+2𝑚=29 −5 −5 2𝑚 24 = 2 2 𝑚 = 12 𝑚𝑒𝑙𝑜𝑛𝑠 12

Example C: Write an equation. Then solve the equation. Ms. Ritter grew up on a small farm in S. Indiana. When she was in 7th grade, her allowance depended on how much produce she helped sell. Her allowance was $5, but she received an extra $2 for every melon she sold. If her allowance last week was $ 29, how many melons did she sell? 𝐶𝑜𝑛𝑠𝑡𝑎𝑛𝑡 𝑇𝑒𝑟𝑚 𝑉𝑎𝑟𝑖𝑎𝑏𝑙𝑒 𝑇𝑒𝑟𝑚 𝑇𝑜𝑡𝑎𝑙 5 + 2𝑚 = 29