Variables on both sides

Answer: −5

1. Subtract 2x and 11 from both sides
2. divide by 7:x=−5.

Answer: 4

1. Subtract 2x from both sides: 7x+13=41.
2. Subtract 13 from both sides: 7x=28.
3. Divide by 7:x=4.
4. Check: both sides equal 49 when x=4.

Answer: 0

1. Subtract 2x from both sides: 4x+2=2.
2. Subtract 2 from both sides: 4x=0.
3. Divide by 4:x=0.
4. Check: both sides equal 2 when x=0.