Question

a.x+(-35)=18

b.-2x×(-17)=15

c.|x+9|×2=10

Answer 1

\(a,x+\left(-35\right)=18\)

\(\Rightarrow x=18-\left(-35\right)=18+35=53\)

\(b,-2x.\left(-17\right)=15\)

\(\Rightarrow-2x=-\frac{15}{17}\)

\(\Rightarrow x=\frac{-15}{17}:-2=\frac{-15}{17}.\frac{\left(-1\right)}{2}=\frac{15}{34}\)

\(c,\left|x+9\right|.2=10\)

\(\Rightarrow\left|x+9\right|=10:2=5\)

\(\Rightarrow\orbr{\begin{cases}x+9=5\\x+9=\left(-5\right)\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}x=\left(-4\right)\\x=\left(-14\right)\end{cases}}\)

Answer 2

\(a,\)\(x+\left(-35\right)=18\)

\(\Leftrightarrow x=18+35=53\)

\(b,\)\(-2x\left(-17\right)=15\)

\(\Leftrightarrow2x=\frac{15}{17}\)

\(\Leftrightarrow x=\frac{15}{17}\cdot\frac{1}{2}=\frac{15}{34}\)

\(c,\)\(\left|x+49\right|\cdot2=10\)

\(\Leftrightarrow\left|x+49\right|=5\)

\(\Leftrightarrow\hept{\begin{cases}x+49=5\\x+49=-5\end{cases}}\)

\(\Leftrightarrow\hept{\begin{cases}x=-44\\x=-54\end{cases}}\)

Answer 3

a, 

x-35=18

=>x=35+18

=>x=53

Answer 4

b, 

-2x.(-17)=15

=>-2x=-15/17

=> x=15/34

Answer 5

|x+9|.2=10

=>|x+9|=5

=> x€[14,(-4)]