**Question: **

Solve it algebraically or using matrices.

2x (1) + 2x (2) + 9x (3) = 7

**Answer:**

**Step 1: **

2x (1) + 2x (2) + 9x (3) = 7

**Step 2: **

let x (2) = t, X (3) = v

**Step 3:**

7 – 2t – 9v

X (1) = __________________

2

**Step 4:**

**Need Help with other College Math Questions?** Download Intellecquity **Now!**