Question

22+4(2x-4)=-26

71-(8-x)=-12+71

Answer 1

\(\left(+\right)22+4\left(2x-4\right)=-26\)

\(\Leftrightarrow22+8x-16=-26\)

\(\Leftrightarrow x=\dfrac{-26-22+16}{8}=-4\)

\(\left(+\right)71-\left(8-x\right)=-12+71\)

\(\Leftrightarrow71-8+x=-12+71\)

\(\Leftrightarrow x=-12+71-71+8=-4\)

Answer 2

22+4.(2x-4)=-26

<=> 4.(2x-4)= -26-22

<=>4.(2x-4)=-48

<=>2x-4=-48:4=-12

<=>2x=-12+4=-8

<=>x=-8:2=-4

Vậy: S={-4}

 

---

71-(8-x)=-12+71

<=>71-8+x=83

<=>x=83+8-71=20

Vậy S={20}

Answer 3

\(22+4\left(2x-4\right)=-26\)

        \(4\left(2x-4\right)=-26-22=-48\)

           \(2x-4=-48:4=-12\)

          \(2x=-12+4=-8\)

          \(x=-8:2=-4\)

Answer 4

\(71-\left(8-x\right)=-12+71\Leftrightarrow71-\left(8-x\right)=59\)

                                                      \(8-x=71-59=12\)

                                                             \(x=8-12=-4\)