Make a the subject get a on its own x(a+2)=7
2 answers:
X (a + 2) = 7
First let's multiply out the brackets on the left side of the equation.
x (a + 2) --> Multiply everything inside the brackets by x.
xa + 2x = 7
Now, both elements of the left-hand side of the equation contain x, so we can divide both sides of the equation by x.
xa + 2x = 7
a + 2 = 7/x
To find a now, just subtract 2 from both sides.
a = 7/x - 2
X(a + 2) = 7
Divide both sides by x.
x(a + 2) / x = 7 / x
(a + 2) = (7/x)
a = (7/x) - 2
Hope this explains it.
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