Jonayed tried to solve 3a + 4 = 2a + 7 working backwards, but he couldn't figure out how to make the flowchart. Why do you think he had trouble?

There is not flowchart so I just solve the problem:

Solve for a:

3 a + 4 = 2 a + 7

Subtract 2 a from both sides:

(3 a - 2 a) + 4 = (2 a - 2 a) + 7

3 a - 2 a = a:

a + 4 = (2 a - 2 a) + 7

2 a - 2 a = 0:

a + 4 = 7

Subtract 4 from both sides:

a + (4 - 4) = 7 - 4

4 - 4 = 0:

a = 7 - 4

7 - 4 = 3:

Answer: a = 3