What is 7 plus 4j greater than or equal 31?

Answer 1

7 + 4j ≥ 31

If we move the 7 to the other side by subtracting 7 from both sides

7 - 7 + 4j ≥ 31 - 7

4j ≥ 24

Now we can divide both sides by 4 to find j on its own

(4j) / 4 ≥ (24) / 4

j ≥ 6

To check

7 + (4 x 6) ≥ 31

So j ≥ 6

Remember that we need to keep the j ≥ 6. The sign remains the same unless we divide both sides by a negative number in which case it switches but we have not done this.