3x -9 =7x + 12Find X
Simple....you have:3x-9=7x+12To even solve this....isolate the variable your are trying to solve for....3x-9=7x+12-3x -3x-9=4x+12-9=4x+12-12 -12-21=4xSimplify.....\(\frac{-21}{4} = \frac{4x}{4}\)\(\frac{-21}{4} =x\)Thus, your answer.