Step-by-step explanation:
y = 2(x -1)
Expand the parenthesis:
y = 2x - 2
interchange x and y in the equation above:
x = 2y - 2
Then make y the subject of the formula:
add two toth sides: x +2 = 2y - 2
x + 2 = 2y
divide both sides by 2:
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