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# algebra

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solve          −(2x+1)+4x=13+2(1+5x)

Jan 28, 2017

#1
+109518
+10

−(2x+1)+4x=13+2(1+5x)

\begin{align} −(2x+1)+4x&=13+2(1+5x)\\ [−1(2x+1)]+4x&=13+[+2(1+5x)]\\ [-2x-1]+4x&=13+[2+10x]\\ -2x-1+4&=13+2+10x\\ -1+2x&=15+10x\\ -1+2x\textcolor{blue}{-2x}&=15+10x\textcolor{blue}{-2x}\\ -1&=15+8x\\ -1\textcolor{blue}{-15}&=15+8x\textcolor{blue}{-15}\\ -16&=8x\\ -2&=x\\ x&=-2\\ \end{align}

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Jan 28, 2017

#1
+109518
+10

−(2x+1)+4x=13+2(1+5x)

\begin{align} −(2x+1)+4x&=13+2(1+5x)\\ [−1(2x+1)]+4x&=13+[+2(1+5x)]\\ [-2x-1]+4x&=13+[2+10x]\\ -2x-1+4&=13+2+10x\\ -1+2x&=15+10x\\ -1+2x\textcolor{blue}{-2x}&=15+10x\textcolor{blue}{-2x}\\ -1&=15+8x\\ -1\textcolor{blue}{-15}&=15+8x\textcolor{blue}{-15}\\ -16&=8x\\ -2&=x\\ x&=-2\\ \end{align}

Melody Jan 28, 2017
#2
+9457
+5

solve −(2x+1)+4x=13+2(1+5x)

$$-(2x+1)+4x=13+2(1+5x)$$            to calculate

$$-2x-1+4x=13+2+10x$$

Change of page with change of sign

$$-8x=16$$                                                            divide by -8

$$x=-2$$

!

Jan 28, 2017