Well for the first equation: 4.5x = 27 (we have moved the -7 across by adding it to both sides)
Then we will divide 27 by 4.5 to find x:
x = 6
Equation #2: let’s move that three across by subtracting from both sides:
2x = -10
Now we divide both sides by 2 to find x:
x = -5
We can eliminate now to find the third one, but let’s solve it anyway by substituting the known value of x in:
(-3 X -7) + 7 = 28
[two negatives multiplied together make a positive]
21 + 7 = 28
Yes it does indeed!
I hope I have helped you. Best of luck with your studies!