1. y = 5x - 2
2x + 9y = 10
Step 1. Plug in the 'y' value
EX: 2x + 9(5x - 2) = 10
Step 2. Simply 9(5x - 2)
EX: 45x -18
Step 3. Combine 2x + 45x - 18 = 10
EX: 47x - 18 = 10
Step 4. Get '47x' by itself 47x - 18 = 10
47x - 18 = 10
+ 18 +18
47x = 18
Step 5. Divide 47 from both sides
47/47x = 47/18
x = 2.61
ANSWER: x = 2.61
Okay...hahaa, this is so far what I have. Hopefully this helps you! Good luck on any quiz/test you might have!