Question

1,(y+7)x(y-5)=0

2,25-(30+x)=(-24+3)

ai giúp mik 2 câu này với

Answer 1

1, \(\left(y+7\right)\left(y-5\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}y+7=0\\y-5=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}y=-7\\y=5\end{matrix}\right.\)

2, \(25-\left(30+x\right)=\left(-24+3\right)\)

\(\Rightarrow25-\left(30+x\right)=-21\)

\(\Rightarrow30+x=25-\left(-21\right)\)

\(\Rightarrow30+x=25+21\)

\(\Rightarrow30+x=46\)

\(\Rightarrow x=46-30\)

\(\Rightarrow x=16\)

Answer 2

1. y = -7,5

2. x = 16