Answer:
5x - 13y + 2
Step-by-step explanation:
Given: 2x – 4y + 6 + 3x – 9y – 4
Combine all like terms:
5x - 13y + 2
X² - 9 = 55
+ 9
x² = 64
√
x = ± 8
So your answer would be x = 8 or x = -8
I hope this helps!
Standard form (as in Ax + By = C) after you have distributed the negative "-" to x+7, you can keep one side for variables and another for constants (C). So you would subtract x from both sides then finally, add 2 to both sides.