Question-212417

Question Number 212417 by mr W last updated on 13/Oct/24

Commented by mr W last updated on 13/Oct/24

$${unsolved}\:{old}\:{question}\:\mathrm{212291} \\ $$

Answered by mr W last updated on 13/Oct/24

Commented by mr W last updated on 13/Oct/24

$${Z}={X}+\mathrm{10} \\ $$$${X}+\mathrm{25}={Z}+\mathrm{10}+{Y}={X}+\mathrm{20}+{Y} \\ $$$$\Rightarrow{Y}=\mathrm{5} \\ $$$${X}×{Y}=\mathrm{10}×\mathrm{25} \\ $$$$\Rightarrow{X}=\mathrm{50} \\ $$$$\left[{ABCD}\right]=\mathrm{10}+\mathrm{25}+\mathrm{50}+\mathrm{5}=\mathrm{90}\:\checkmark \\ $$

Commented by mr W last updated on 13/Oct/24

Commented by mr W last updated on 13/Oct/24

$$\frac{{B}}{{C}}=\frac{{A}}{{D}}\:\Rightarrow{A}×{C}={B}×{D} \\ $$

Commented by hardmath last updated on 13/Oct/24

$$\boldsymbol{\mathrm{t}}\mathrm{hank}\boldsymbol{\mathrm{y}}\mathrm{ou}\:\boldsymbol{\mathrm{d}}\mathrm{ear}\boldsymbol{\mathrm{p}}\mathrm{rofessor} \\ $$

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