Question

4 Select the correct answer. Identify the expression equivalent to 44x + x + 7) - 2x+8 -4 by substituting = 1 and x=2, A. 6x +11 OB. 3(x+7) C. 2(3x + 16) D. 3x+ 16

Answer 1

$\begin{gathered} \Rightarrow4(x+x+7)-2x+8-4 \\ \Rightarrow4(2x+7)-2x+4 \\ \Rightarrow8x+28-2x+4 \\ \Rightarrow6x+32 \\ \text{Now, put x=1} \\ \Rightarrow6\times1+32=38 \\ \text{Now from option C, put x=1} \\ 2(3x+16)=2\mleft(3\times1+16\mright)=38 \end{gathered}$