The value of the expression is 4.
We can find this by taking the original equation and plugging in 3 every time we see an x.
4
Let’s use y as a replacement for a number. You would do 3y-7 since you multiply by three and take away seven.
2x + 4y = 14
4x + y = 20......multiply by -4
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2x + 4y = 14
-16x - 4y = -80 (result of multiplying by -4)
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-14x = -66....as u can see, ur y's cancel out
so ur answer is : 1st answer choice <==
** and just so u know, u could have multiplied the 1st equation by -2, and it would have cancelled out ur x's
Answer: 450 is your answer
