Solve two-step equations like 3x + 4 = 19

Answer Key - Grade 7 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Ari draws a bar model for 3x + 6 = 21, sharpening the pencil twice to get the lines neat. What is x?

   5
2. 2.

   Bo colors a bar model for 4x + 8 = 44, using a new crayon for every piece. What is x?

   9
3. 3.

   Esme sketches 3x − 3 = 18 as bars on lined paper. What is x?

   7
4. 4.

   Jun draws the bars for 4x − 8 = 20 in pen, very boldly. What is x?

   7
5. 5.

   Milo copies 5x − 15 = -30 from the board and draws the bars. What is x?

   -3
6. 6.

   Noah's quiz starts with 2x − 8 = -2. What is x?

   3
7. 7.

   Zee has four possible answers for 5x − 10 = 25, and only one works. Which value of x makes it true?

   • 3
   • 15
   • 35
   • 7
8. 8.

   Ari checks a friend's answers to 3x + 9 = -6 before class. Which value of x makes it true?

   • 5
   • -15
   • -5
   • -11
9. 9.

   Bo's bean sprout is 9 cm tall and grows 3 cm each week. After how many weeks is it 30 cm tall?

   7
10. 10.

    Esme has $8 and saves $2 every week for a new kite. After how many weeks does Esme have $30?

    11