Question

giúp mình làm những câu bôi vàng vs ạ

Answer 1

\(a)2*15=5x=>5x=30=>x=30:5=6\)

\(b)-x=-5*5=-25=>x=25\) nhé =)

Answer 2

a x=6

b x=25

h =\(\dfrac{-9}{10}\)

Answer 3

a: x/15=2/5

nên x=6

b: -5/x=-1/5

nên 5/x=1/5

hay x=25

c: x/9=10/3

nên x=30

d: x/-14=5/2

hay x=-14x5/2=-35

Answer 4

\(a.\dfrac{2}{5}=\dfrac{x}{15}\\ \Rightarrow x=\dfrac{2.15}{5}=6\\ b.\dfrac{-1}{5}=\dfrac{-5}{x}\\ \Rightarrow x=\dfrac{-5.5}{-1}=25\\ h.\dfrac{10x}{-5}=\dfrac{180}{100}\\ \Rightarrow10x=\dfrac{\left(-5\right).180}{100}=-9\\ x=-9:10=\dfrac{-9}{10}\)