Answer:
7-(a-2)
Step-by-step explanation:
5(4+y) is the correct answer, you would be adding 4 and y then multiplying the sum by 5
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x isn't a linear equation, it's just a variable or an expression or a letter of the alphabet.
x = 0 is a linear equation and is a line in the Cartesian plane. In fact, it's the y axis itself.
So every point on the line x=0 is a y intercept.
There is no "the" y intercept, no unique y intercept.