3 of 4 A notebook costs £1.30, a pen costs 42p, a pencil costs 25p and a sharpener costs 81p.
Remi buys 3 pencils, 2 pens, 2 sharpeners and some notebooks.
He pays with £9 and receives 59p change.
How many notebooks did he buy?

x=11°

<Bec = 33°

<Ced = 39°

Step-by-step explanation:

That's a right angle so it would be 90 degrees angle.

18+3x+4x-5=90

Lets simplify it to make it easier to work out by collecting like terms.

First all the variable 3x+4x=7x

Then the numbers 18+-5=13

13(-13)+7x = 90(-13)take away 13 from both sides

(Opposite operators EG, Add becomes subtract)

7x = 77 then divide 7 from both sides

x=11

Then work out

3x11=33 degrees

4x11=44-5=39 degrees

To double check 39+33+18=90 degrees