Writing Equations

What is the first step to solve this equation 2x + 11 = 23?

• Add 3 to both sides

• Subtract 11 from both sides

• Add 1 to both sides

• Divide 3 on both sides

Which equation matches the following situation? 331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus?

• n= # of students in each bus; 6n + 7 =331

• n=# of buses; 6n + 7 =331

• n= # of students in each bus; 6 + 7n =331

• n= # of students in each bus; 6n - 7 =331

WRITE AN EQUATION
April had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?

• n=total cost pencils; 7n+10=24

• n=cost of 1 pencil; 7n-10=24

• n=cost of 1 pencil; 7n+10=24

• n=cost of 1 pencil; -7n-10=24

Bonnie spent half of her weekly allowance playing mini-golf. To earn more money her parents let her wash the car for $4. What is her weekly allowance if she ended with $12? (Define 'n' and write the equation.)

• n=wkly allowance; 2n-4=12

• n=wkly allowance; 2n+4=12

• n=wkly allowance; n/2-4=12

• n=wkly allowance; n/2+4=12

The space club is having some posters printed. The printer charges $250 plus $2 per poster. How can I figure out how many posters I could print for $1,000?

• 250x + 2 = 1000

• 1000 + 2x = 250

• 250 - 2x = 1000

• 2x + 250 = 1000

Jim paid a gym membership fee of $50, plus $20 per month. Jim has paid a total of $290 to the gym. How many months has Jim been a member of the gym?

• 50 + 20m = 290

• 20 + 50m = 290

• 50 + 20 = m

• 50m - 20 = 290

A computer printer can print 10 pages per minute.There were already 35 pages in the tray. The total pages printed was 115 pages. Write an expression for the number of pages the printer can print in m minutes.

• 10m + 35 = 115

• 10m + 115 = 35

• 115m + 35 = 10

• 35m + 10 = 115

Mr Carrillo's family bought lunch from Culvers. They also bought some sodas from Quick Trip for $5.00. The meals cost $6.00 each. The total cost of the lunch and soda was $41.00. Let x represent the cost of the number of meals that Mr. Carrillo bought. Write the equation and solve for x.

• -5+6x = 41, 4 meals

• 6x + 5 = 41, 6 meals

• 6x = 36 meals

• 5 + 6x = 41, 7 meals

Scott works on cars. He charges $35 for each car plus $7 per hour. Write an equation that represents this scenario if Kylie's car bill was $63.

• 7x + 35 = 63

• 7x = 63

• 7x + 63 = 35

• 35x + 7 = 63

An electrician charges $90 per hour plus a $50 travelling fee. It costs $1000 in total.

• 1000 = 50x + 90

• 1000 = 90x + 50

• 90 = 1000 + 50x

• 90x = 1000 + 50

• 50 = 90x + 1000