Question

A *1.25 + 2.5 = 1.25 * 9

 

Answer 1

a*1,25+2,5=1,25*9

=>a*1,25+2*1,25=1,25*9

=>(a+2)*1,25=1,25*9

=>          a+2=9

=>             a=9-2

=>             a=7

Answer 2

A x 1,25 + 2,5 = 1,25 x 9

A x 1,25 + 2,5 = 11,25

A x 1,25          = 11,25 - 2,5

A x 1,25          = 8,75

A                     = 8,75 : 1,25

A                     = 7

Answer 3

\(A\times1,25+2,5=1,25\times9\)
\(A\times1,25+2.5=11,25\)
\(A\times1,25=11,25-2,5\)
\(A\times1,25=8.75\)
\(A=8,75:1,25\)
\(A=7\)