Question

Answer 1

a: \(2,5:4x=0,5:0,2\)

=>\(\frac{2.5}{4x}=\frac52\)

=>\(4x=2,5\cdot\frac25=1\)

=>\(x=\frac14\)

b: \(\frac15x:3=\frac23:0,25\)

=>\(\frac{x}{5}:3=\frac23:\frac14=\frac23\cdot4=\frac83\)

=>\(\frac{x}{5}=\frac83\cdot3=8\)

=>\(x=8\cdot5=40\)

c: \(1.25:0,8=\frac38:0,2x\)

=>\(\frac38:0,2x=\frac54:\frac45=\frac{25}{16}\)

=>\(0,2x=\frac38:\frac{25}{16}=\frac38\cdot\frac{16}{25}=\frac{3\cdot2}{25}=\frac{6}{25}\)

=>\(x\cdot\frac15=\frac{6}{25}\)

=>\(x=\frac{6}{25}:\frac15=\frac{6}{25}\cdot5=\frac65\)