Question

Which equation is true when X = - 15A, 3x-11=-34B, (x/3) + 17 = 12C, (x/5) +2.5 = 0.5D, -53 + 4x = 7

Answer 1

We have to replace x with the value -15 and see if the equality stands or not.

A. FALSE

`\begin{gathered} 3x-11=-34 \\ 3\cdot(-15)-11=-34 \\ -45-11=-34 \\ -56\\e-34 \end{gathered}`

B. TRUE

`\begin{gathered} ((x)/(3))+17=12 \\ -(15)/(3)+17=12 \\ -5+17=12 \\ 12=12 \end{gathered}`

C. FALSE

`\begin{gathered} \mleft(x/5\mright)+2.5=0.5 \\ \mleft(-15/5\mright)+2.5=0.5 \\ -3+2.5=0.5 \\ -0.5\\e0.5 \end{gathered}`

D. FALSE

`\begin{gathered} -53+4x=7 \\ -53+4(-15)=7 \\ -53-60=7 \\ -113\\e7 \end{gathered}`

The answer is Option B.