Question

(X4) 40 - (Y7) 40 / X4 - Y7

Answer 1

Respuesta:

(X4) 40 - (Y7) 40 / X4 - Y7

$\frac{\left(X\cdot \:4\right)\cdot \:40-\left(Y\cdot \:7\right)\cdot \:40}{X\cdot \:4-Y\cdot \:7}\\\\=\frac{160X-280Y}{4X-7Y}\\\\=\frac{40\left(4X-7Y\right)}{X\cdot \:4-Y\cdot \:7}\\\\=40$