Find answers to your most challenging questions with the help of IDNLearn.com's experts. Find the answers you need quickly and accurately with help from our knowledgeable and experienced experts.

-4x + 9 = -7x - 12
+7 +7x
3x + 9 = 12
-9 -9
3x/3 = 3/3
x = 1
What is the error? How to fix the mistake. Solve the equation.​