Tìm x, y ∈ Z, biết:
a) ($\frac{31}{20}$ – $\frac{26}{45}$) × $\frac{-36}{35}$ ≤ x × ($\frac{51}{56}$ + $\frac{8}{21}$ + $\frac{1}{3}$) × $\frac{8}{13}$
b) $\frac{3}{x}$ + $\frac{y}{3}$ = $\frac{5}{6}$ (x khác 0)
Tìm x, y ∈ Z, biết: a) ($\frac{31}{20}$ – $\frac{26}{45}$) × $\frac{-36}{35}$ ≤ x × ($\frac{51}{56}$ + $\frac{8}{21}$ + $\frac{1}{3}$) × $\frac{8}{
By Katherine
a) $\frac{41}{90}$ × $\frac{-36}{35}$ = $\frac{-82}{175}$
x× ( $\frac{52}{56}$ + $\frac{8}{21}$ + $\frac{1}{3}$ ) × $\frac{8}{13}$
= x $\frac{18}{3}$ × $\frac{8}{13}$
= x ×1= x
⇒$\frac{-82}{175}$ ≤ x
b) $\frac{3}{x}$ + $\frac{y}{3}$ = $\frac{5}{6}$
NO BT