Maths

Walt: Substitute values in a formula. 

Is

u = -8

a solution to this equation?

-69

=

11  +  10 u

Yes Or No?

The Answer is yes

The way you work this out is to do...

10 x u that is -80

Then + 11 that would make it -69

So that means the answer is yes.

Is b = 43 a solution to this equation?

43 - 2b + 1 = 44 

Yes or No?
The Answer is yes because
 2 x b = 86- 43 = 43 + 1 = 44
So it is yes