1.The English exercises are difficult

=>What difficult English exercises

2. How much is the school bag?

=>: How much does the school bag cost?

3. Mrs Lan takes care of her children.

=>: Mrs lan looks after ofhẻ children.

4. We have a breakfast that lasts thirty minutes.

=>: We have a thirty-minute breakfast.

a,(x+1)³=2⁶

=>(x+1)³=4³

=>x+1=4

=>x=3

b,x^x+1=x^x+4

Để x^x+1=x^x+4 thì x=0 hoặc 1

c,2^x-1=3^2016x-2016

=>2^x-1=3^2016(x-1)

Để 2^x-1=3^2016(x-1) thì x=0 hoặc 1

Vì x khác 00 nên x=1

d,tương tự