Question

2.x+17=3⁵:3²           (19-x).2-20=4

Answer 1

a: =>2x+17=27

=>2x=27-17=10

=>x=5

b: =>2(19-x)=24

=>19-x=12

=>x=7

Answer 2

\(2\cdot x+17=3^5:3^2\)

\(\Rightarrow2\cdot x+17=3^3\)

\(\Rightarrow2\cdot x+17=27\)

\(\Rightarrow2\cdot x=27-17\)

\(\Rightarrow2\cdot x=10\)

\(\Rightarrow x=\dfrac{10}{2}\)

\(\Rightarrow x=5\)

___________

\(\left(19-x\right)\cdot2-20=4\)

\(\Rightarrow\left(19-x\right)\cdot2=24\)

\(\Rightarrow19-x=24:2\)

\(\Rightarrow19-x=12\)

\(\Rightarrow x=19-12\)

\(\Rightarrow x=7\)