Question

2+2×[2+2×(2-2:a)]=10​

Answer 1

$\it 2+2\cdot[2+2\cdot(2-2:a)]=10|_{-2}\Rightarrow 2\cdot[2+2\cdot(2-2:a)]=8|_{:2}\Rightarrow\\ \\ \Rightarrow 2+2\cdot(2-2:a) =4|_{-2}\Rightarrow 2\cdot(2-2:a)=2|_{:2} \Rightarrow 2-2:a=1 \Rightarrow 2:a=1\\ \\ \Rightarrow a=2$

Answer 2

Răspuns:

2+2×[2+2×(2-2:a)]=10​

2[2+2(2-2:a)]=10-2

2+2(2-2:a)=8:2

2(2-2:a)=4-2

2-2:a=2:2

-2:a=1-2

-2:a=-1

a=2