Question

1. упростите выражения 1) (5x-3y)-(6x-y) 2) -4(n+m)-5(m-n)
$2. \frac{2-5x}{3} = \frac{10+x}{2}$

Answer 1

1) (5x-3y)-(6x-y)=5x-3y-6x+y=-x-2y
2) -4(n+m)-5(m-n)=-4n-4m-5m+5n=n-9m
3)$\frac{2-5x}{3} = \frac{10+x}{2}$=(2-5x)×2=3×(10+x)=4-10x=30+3x=-10x-3x=30-4=7x=26=3$\frac{5}{7}$