Solve this multi step equation: 7j + 20 = 3j + 40

j=5

Step-by-step explanation:

7j+20=3j+40

Step 1: Subtract 3j from both sides.

7j+20−3j=3j+40−3j

4j+20=40

Step 2: Subtract 20 from both sides.

4j+20−20=40−20

4j=20

Step 3: Divide both sides by 4.

4j/4

20/4

j=5

j=5

j = 5

Solve this multi step equation: 7j + 20 = 3j + 40

First step: bring the numbers that don't have a variable on the other side of the equal sign.

7j - 3j  =  - 20 + 40

*TIP: REMEMBER: when you have a positive number, and you bring it on the other side of the equal sign, it becomes negative; same thing with a negative number. When you have a negative number, and you bring it on the other side of the equal sign, it becomes positive.*

Second step: Solve the equations on both sides.

4j = 20

Final step: (this step is easy) divide 20 by 4

20/4 = 5;

Therefore, j = 5.

the correct is answer is a 9-sided polygon!

step-by-step explanation: