`a, 134 : (x-3) = 67`
`x - 3 = 2 ->x=5`
`b, 3^x . 15 = 15`
`3^x = 1`
`x = 0`
`c, (3x-7)^2 = 64`
`<=>` \(\left[{}\begin{matrix}3x-7=8\\3x-7=-8\end{matrix}\right.\)
`<=>` \(\left[{}\begin{matrix}x=5\\x=-\dfrac{1}{3}\end{matrix}\right.\)
\(a,134\div\left(x-3\right)=35+160\div5\)
\(134\div\left(x-3\right)=35+32\)
\(134\div\left(x-3\right)=67\)
\(x-3=134\div67\)
\(x-3=2\)
\(x=2+3\)
\(x=5\)
\(b,3^{x+1}.5-10\div2+5=15\)
\(3^{x+1}.5-5+5=15\)
\(3^{x+1}.5-5=15-5\)
\(3^{x+1}.5-5=10\)
\(3^{x+1}.5=10+5\)
\(3^{x+1}.5=15\)
\(3^{x+1}=15\div5\)
\(3^{x+1}=3\)
\(x=3-3\)
\(x=0\)
\(c,\left(3x-7\right)^2-37=3^3\)
\(\left(3x-7\right)^2=3^3+37\)
\(\left(3x-7\right)^2=64\)
\(\left(3x-7\right)^2=8^2\)
\(3x=8+7\)
\(3x=15\)
\(x=15\div3\)
\(x=5\)
