\(a,x\times7,2+4,5\times x=17,55\)
\(x\times\left(7,2+4,5\right)=17,55\)
\(x\times11,7=17,55\)
\(x=17,55:11,7\)
\(x=1,5\)
\(b,x:0,25+x\times11=36\)
\(x\times4+x\times11=36\)
\(x\times\left(4+11\right)=36\)
\(x\times15=36\)
\(x=36:15\)
\(x=2,4\)
a: =>11,7x=17,55
=>x=1,5
b: =>x*4+x*11=36
=>15x=36
=>x=2,4