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2x+y=7, what is the value of y if x=3?

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Hi student, let me help you out!

...................................................................................................

Let's substitute the value of x for x:
\mathrm{2(3)+y=7}.

Upon simplifying, we get:
\mathrm{6+y=7}.

Now we solve for y by subtracting 6 from both sides:
\mathrm{1=y}

Thus, the solution is
\bigstar~\underline{\boxed{\mathrm{y=1}}}

Hope it helped you out, ask in comments if any queries arise.

User Wittakarn
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