Question

25 + 3(x - 8) = 106

3² ( x + 4) - 5² = 5.22

Answer 1

\(a,\)\(25+3\left(x-8\right)=106.\)

\(\Rightarrow25+3x-24=106\)

\(\Rightarrow3x+1=106\)

\(\Rightarrow3x=105\)\(\Rightarrow x=35\)

\(b,3^2\left(x+4\right)-5^2=5.22\)

\(\Rightarrow9\left(x+4\right)-25=110\)

\(\Rightarrow9x+36-25=110\)

\(\Rightarrow9x+11=110\)

\(\Rightarrow9x=99\Leftrightarrow x=11\)

Answer 2

\(a,25:3\left(x-8\right)=106\)

\(\Rightarrow25+3x-24=106\)

\(\Rightarrow3x+1=106\)

\(\Rightarrow x=35\)

\(b,3^2\left(x+4\right)-5^2=5.22\)

\(\Rightarrow9x+36-25=110\)

=\(9x+11=110\)

\(\Rightarrow9x=99\)

\(\Rightarrow x=11\)